Finding the Fourth Proportional to 22,459.28, 33,490.81 and 21,355.61

Step by Step Solution

1. Step 1: Write the proportion equation
   22,459.28 : 33,490.81 = 21,355.61 : x
2. Step 2: Convert to fraction form
   22,459.28/33,490.81 = 21,355.61/x
3. Step 3: Cross multiply
   22,459.28x = 33,490.81 × 21,355.61
4. Step 4: Simplify right side
   22,459.28x = 715,216,456.10
5. Step 5: Solve for x
   x = 715,216,456.10/22,459.28
6. Step 6: Final answer
   x = 31,845.03