Finding the Fourth Proportional to 31,665.79, 47,501.43 and 8,292.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,665.79 : 47,501.43 = 8,292.25 : x
2. Step 2: Convert to fraction form
   31,665.79/47,501.43 = 8,292.25/x
3. Step 3: Cross multiply
   31,665.79x = 47,501.43 × 8,292.25
4. Step 4: Simplify right side
   31,665.79x = 393,893,732.92
5. Step 5: Solve for x
   x = 393,893,732.92/31,665.79
6. Step 6: Final answer
   x = 12,439.09