Finding the Fourth Proportional to 106,508.71, 159,513.99 and 84,172.15

Step by Step Solution

1. Step 1: Write the proportion equation
   106,508.71 : 159,513.99 = 84,172.15 : x
2. Step 2: Convert to fraction form
   106,508.71/159,513.99 = 84,172.15/x
3. Step 3: Cross multiply
   106,508.71x = 159,513.99 × 84,172.15
4. Step 4: Simplify right side
   106,508.71x = 13,426,635,493.38
5. Step 5: Solve for x
   x = 13,426,635,493.38/106,508.71
6. Step 6: Final answer
   x = 126,061.38