Finding the Fourth Proportional to 22,436.64, 30,957.12 and 13,491

Step by Step Solution

1. Step 1: Write the proportion equation
   22,436.64 : 30,957.12 = 13,491 : x
2. Step 2: Convert to fraction form
   22,436.64/30,957.12 = 13,491/x
3. Step 3: Cross multiply
   22,436.64x = 30,957.12 × 13,491
4. Step 4: Simplify right side
   22,436.64x = 417,642,505.92
5. Step 5: Solve for x
   x = 417,642,505.92/22,436.64
6. Step 6: Final answer
   x = 18,614.31