Finding the Fourth Proportional to 87,909, 121,313.93 and 47,623.55

Step by Step Solution

1. Step 1: Write the proportion equation
   87,909 : 121,313.93 = 47,623.55 : x
2. Step 2: Convert to fraction form
   87,909/121,313.93 = 47,623.55/x
3. Step 3: Cross multiply
   87,909x = 121,313.93 × 47,623.55
4. Step 4: Simplify right side
   87,909x = 5,777,399,978.47
5. Step 5: Solve for x
   x = 5,777,399,978.47/87,909
6. Step 6: Final answer
   x = 65,720.23