Finding the Fourth Proportional to 69,901.20, 96,555.98 and 51,788.72

Step by Step Solution

1. Step 1: Write the proportion equation
   69,901.20 : 96,555.98 = 51,788.72 : x
2. Step 2: Convert to fraction form
   69,901.20/96,555.98 = 51,788.72/x
3. Step 3: Cross multiply
   69,901.20x = 96,555.98 × 51,788.72
4. Step 4: Simplify right side
   69,901.20x = 5,000,510,612.55
5. Step 5: Solve for x
   x = 5,000,510,612.55/69,901.20
6. Step 6: Final answer
   x = 71,536.84