Finding the Fourth Proportional to 87,693.38, 121,016.72 and 47,407.18

Step by Step Solution

1. Step 1: Write the proportion equation
   87,693.38 : 121,016.72 = 47,407.18 : x
2. Step 2: Convert to fraction form
   87,693.38/121,016.72 = 47,407.18/x
3. Step 3: Cross multiply
   87,693.38x = 121,016.72 × 47,407.18
4. Step 4: Simplify right side
   87,693.38x = 5,737,061,428.05
5. Step 5: Solve for x
   x = 5,737,061,428.05/87,693.38
6. Step 6: Final answer
   x = 65,421.83