Finding the Fourth Proportional to 21,705.32, 29,949.54 and 13,324.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,705.32 : 29,949.54 = 13,324.52 : x
2. Step 2: Convert to fraction form
   21,705.32/29,949.54 = 13,324.52/x
3. Step 3: Cross multiply
   21,705.32x = 29,949.54 × 13,324.52
4. Step 4: Simplify right side
   21,705.32x = 399,063,244.72
5. Step 5: Solve for x
   x = 399,063,244.72/21,705.32
6. Step 6: Final answer
   x = 18,385.50