Finding the Fourth Proportional to 21,548.10, 32,308.92 and 8,385.15

Step by Step Solution

1. Step 1: Write the proportion equation
   21,548.10 : 32,308.92 = 8,385.15 : x
2. Step 2: Convert to fraction form
   21,548.10/32,308.92 = 8,385.15/x
3. Step 3: Cross multiply
   21,548.10x = 32,308.92 × 8,385.15
4. Step 4: Simplify right side
   21,548.10x = 270,915,140.54
5. Step 5: Solve for x
   x = 270,915,140.54/21,548.10
6. Step 6: Final answer
   x = 12,572.58