Finding the Fourth Proportional to 22,496.32, 31,039.68 and 13,059.28

Step by Step Solution

1. Step 1: Write the proportion equation
   22,496.32 : 31,039.68 = 13,059.28 : x
2. Step 2: Convert to fraction form
   22,496.32/31,039.68 = 13,059.28/x
3. Step 3: Cross multiply
   22,496.32x = 31,039.68 × 13,059.28
4. Step 4: Simplify right side
   22,496.32x = 405,355,872.23
5. Step 5: Solve for x
   x = 405,355,872.23/22,496.32
6. Step 6: Final answer
   x = 18,018.76