Finding the Fourth Proportional to 22,901.50, 31,604.07 and 12,965.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,901.50 : 31,604.07 = 12,965.50 : x
2. Step 2: Convert to fraction form
   22,901.50/31,604.07 = 12,965.50/x
3. Step 3: Cross multiply
   22,901.50x = 31,604.07 × 12,965.50
4. Step 4: Simplify right side
   22,901.50x = 409,762,569.59
5. Step 5: Solve for x
   x = 409,762,569.59/22,901.50
6. Step 6: Final answer
   x = 17,892.39