Finding the Fourth Proportional to 22,631.31, 31,231.49 and 12,560.74

Step by Step Solution

1. Step 1: Write the proportion equation
   22,631.31 : 31,231.49 = 12,560.74 : x
2. Step 2: Convert to fraction form
   22,631.31/31,231.49 = 12,560.74/x
3. Step 3: Cross multiply
   22,631.31x = 31,231.49 × 12,560.74
4. Step 4: Simplify right side
   22,631.31x = 392,290,484.82
5. Step 5: Solve for x
   x = 392,290,484.82/22,631.31
6. Step 6: Final answer
   x = 17,333.97