Finding the Fourth Proportional to 87,788.71, 121,147.55 and 47,501.57

Step by Step Solution

1. Step 1: Write the proportion equation
   87,788.71 : 121,147.55 = 47,501.57 : x
2. Step 2: Convert to fraction form
   87,788.71/121,147.55 = 47,501.57/x
3. Step 3: Cross multiply
   87,788.71x = 121,147.55 × 47,501.57
4. Step 4: Simplify right side
   87,788.71x = 5,754,699,070.15
5. Step 5: Solve for x
   x = 5,754,699,070.15/87,788.71
6. Step 6: Final answer
   x = 65,551.70