Finding the Fourth Proportional to 31,915.92, 47,881.98 and 12,192.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,915.92 : 47,881.98 = 12,192.42 : x
2. Step 2: Convert to fraction form
   31,915.92/47,881.98 = 12,192.42/x
3. Step 3: Cross multiply
   31,915.92x = 47,881.98 × 12,192.42
4. Step 4: Simplify right side
   31,915.92x = 583,797,210.59
5. Step 5: Solve for x
   x = 583,797,210.59/31,915.92
6. Step 6: Final answer
   x = 18,291.72