Finding the Fourth Proportional to 22,931.76, 31,647 and 12,862.32

Step by Step Solution

1. Step 1: Write the proportion equation
   22,931.76 : 31,647 = 12,862.32 : x
2. Step 2: Convert to fraction form
   22,931.76/31,647 = 12,862.32/x
3. Step 3: Cross multiply
   22,931.76x = 31,647 × 12,862.32
4. Step 4: Simplify right side
   22,931.76x = 407,053,841.04
5. Step 5: Solve for x
   x = 407,053,841.04/22,931.76
6. Step 6: Final answer
   x = 17,750.66