Finding the Fourth Proportional to 22,839.31, 31,517.17 and 12,769.03

Step by Step Solution

1. Step 1: Write the proportion equation
   22,839.31 : 31,517.17 = 12,769.03 : x
2. Step 2: Convert to fraction form
   22,839.31/31,517.17 = 12,769.03/x
3. Step 3: Cross multiply
   22,839.31x = 31,517.17 × 12,769.03
4. Step 4: Simplify right side
   22,839.31x = 402,443,689.25
5. Step 5: Solve for x
   x = 402,443,689.25/22,839.31
6. Step 6: Final answer
   x = 17,620.66