Finding the Fourth Proportional to 115,130.50, 172,687.83 and 70,764.10

Step by Step Solution

1. Step 1: Write the proportion equation
   115,130.50 : 172,687.83 = 70,764.10 : x
2. Step 2: Convert to fraction form
   115,130.50/172,687.83 = 70,764.10/x
3. Step 3: Cross multiply
   115,130.50x = 172,687.83 × 70,764.10
4. Step 4: Simplify right side
   115,130.50x = 12,220,098,870.90
5. Step 5: Solve for x
   x = 12,220,098,870.90/115,130.50
6. Step 6: Final answer
   x = 106,141.28