Finding the Fourth Proportional to 22,529.28, 31,086.72 and 12,591.36

Step by Step Solution

1. Step 1: Write the proportion equation
   22,529.28 : 31,086.72 = 12,591.36 : x
2. Step 2: Convert to fraction form
   22,529.28/31,086.72 = 12,591.36/x
3. Step 3: Cross multiply
   22,529.28x = 31,086.72 × 12,591.36
4. Step 4: Simplify right side
   22,529.28x = 391,424,082.74
5. Step 5: Solve for x
   x = 391,424,082.74/22,529.28
6. Step 6: Final answer
   x = 17,374.02