Finding the Fourth Proportional to 22,931.52, 31,645.86 and 12,862.20

Step by Step Solution

1. Step 1: Write the proportion equation
   22,931.52 : 31,645.86 = 12,862.20 : x
2. Step 2: Convert to fraction form
   22,931.52/31,645.86 = 12,862.20/x
3. Step 3: Cross multiply
   22,931.52x = 31,645.86 × 12,862.20
4. Step 4: Simplify right side
   22,931.52x = 407,035,380.49
5. Step 5: Solve for x
   x = 407,035,380.49/22,931.52
6. Step 6: Final answer
   x = 17,750.04