Finding the Fourth Proportional to 71,357.30, 106,933.55 and 52,490.10

Step by Step Solution

1. Step 1: Write the proportion equation
   71,357.30 : 106,933.55 = 52,490.10 : x
2. Step 2: Convert to fraction form
   71,357.30/106,933.55 = 52,490.10/x
3. Step 3: Cross multiply
   71,357.30x = 106,933.55 × 52,490.10
4. Step 4: Simplify right side
   71,357.30x = 5,612,952,732.86
5. Step 5: Solve for x
   x = 5,612,952,732.86/71,357.30
6. Step 6: Final answer
   x = 78,659.83