Finding the Fourth Proportional to 115,145.97, 172,906.52 and 71,053.02

Step by Step Solution

1. Step 1: Write the proportion equation
   115,145.97 : 172,906.52 = 71,053.02 : x
2. Step 2: Convert to fraction form
   115,145.97/172,906.52 = 71,053.02/x
3. Step 3: Cross multiply
   115,145.97x = 172,906.52 × 71,053.02
4. Step 4: Simplify right side
   115,145.97x = 12,285,530,068.43
5. Step 5: Solve for x
   x = 12,285,530,068.43/115,145.97
6. Step 6: Final answer
   x = 106,695.27