Finding the Fourth Proportional to 22,651.32, 31,258.88 and 12,579.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,651.32 : 31,258.88 = 12,579.78 : x
2. Step 2: Convert to fraction form
   22,651.32/31,258.88 = 12,579.78/x
3. Step 3: Cross multiply
   22,651.32x = 31,258.88 × 12,579.78
4. Step 4: Simplify right side
   22,651.32x = 393,229,833.45
5. Step 5: Solve for x
   x = 393,229,833.45/22,651.32
6. Step 6: Final answer
   x = 17,360.13