Finding the Fourth Proportional to 115,132.50, 172,690.83 and 70,766.10

Step by Step Solution

1. Step 1: Write the proportion equation
   115,132.50 : 172,690.83 = 70,766.10 : x
2. Step 2: Convert to fraction form
   115,132.50/172,690.83 = 70,766.10/x
3. Step 3: Cross multiply
   115,132.50x = 172,690.83 × 70,766.10
4. Step 4: Simplify right side
   115,132.50x = 12,220,656,544.86
5. Step 5: Solve for x
   x = 12,220,656,544.86/115,132.50
6. Step 6: Final answer
   x = 106,144.28