Finding the Fourth Proportional to 22,661.30, 31,269.12 and 12,589.58

Step by Step Solution

1. Step 1: Write the proportion equation
   22,661.30 : 31,269.12 = 12,589.58 : x
2. Step 2: Convert to fraction form
   22,661.30/31,269.12 = 12,589.58/x
3. Step 3: Cross multiply
   22,661.30x = 31,269.12 × 12,589.58
4. Step 4: Simplify right side
   22,661.30x = 393,665,087.77
5. Step 5: Solve for x
   x = 393,665,087.77/22,661.30
6. Step 6: Final answer
   x = 17,371.69