Finding the Fourth Proportional to 22,398.16, 30,892.68 and 21,405.52

Step by Step Solution

1. Step 1: Write the proportion equation
   22,398.16 : 30,892.68 = 21,405.52 : x
2. Step 2: Convert to fraction form
   22,398.16/30,892.68 = 21,405.52/x
3. Step 3: Cross multiply
   22,398.16x = 30,892.68 × 21,405.52
4. Step 4: Simplify right side
   22,398.16x = 661,273,879.59
5. Step 5: Solve for x
   x = 661,273,879.59/22,398.16
6. Step 6: Final answer
   x = 29,523.58