Tienes lo siguiente :
1 + 3 + 9 + 27.
Eso es igual a :
<img src="https://tex.z-dn.net/?f=1%2B3%5E1%2B3%5E2%2B3%5E3%2B...%2B3%5E%7B14%7D%3D%20" />
Una fórmula importante que debes saber es :
<img src="https://tex.z-dn.net/?f=1%2Bx%2Bx%5E2%2Bx%5E3%2B...%2Bx%5En%3D%20%5Cfrac%7Bx%5E%7Bn%2B1%7D-1%7D%7Bx-1%7D%20" />
Susituyendo :
<img src="https://tex.z-dn.net/?f=%5Cfrac%7B3%5E%7B14%2B1%7D-1%7D%7B3-1%7D%3D%20%5Cfrac%7B3%5E%7B15%7D-1%7D%7B2%7D%3D%20%5Cfrac%7B14%2C348%2C907-1%7D%7B2%7D%20%3D%20%5Cfrac%7B14%2C348%2C906%7D%7B2%7D%3D7%2C174%2C453%20%20" />
El importe de la finca es $7, 174, 453
Saludos!