Finding the Fourth Proportional to 31,665.02, 47,496.18 and 8,290.94

Step by Step Solution

1. Step 1: Write the proportion equation
   31,665.02 : 47,496.18 = 8,290.94 : x
2. Step 2: Convert to fraction form
   31,665.02/47,496.18 = 8,290.94/x
3. Step 3: Cross multiply
   31,665.02x = 47,496.18 × 8,290.94
4. Step 4: Simplify right side
   31,665.02x = 393,787,978.61
5. Step 5: Solve for x
   x = 393,787,978.61/31,665.02
6. Step 6: Final answer
   x = 12,436.06