Finding the Fourth Proportional to 22,639.30, 31,245.96 and 12,570.96

Step by Step Solution

1. Step 1: Write the proportion equation
   22,639.30 : 31,245.96 = 12,570.96 : x
2. Step 2: Convert to fraction form
   22,639.30/31,245.96 = 12,570.96/x
3. Step 3: Cross multiply
   22,639.30x = 31,245.96 × 12,570.96
4. Step 4: Simplify right side
   22,639.30x = 392,791,713.32
5. Step 5: Solve for x
   x = 392,791,713.32/22,639.30
6. Step 6: Final answer
   x = 17,349.99