Finding the Fourth Proportional to 21,535.86, 32,297.55 and 8,385.30

Step by Step Solution

1. Step 1: Write the proportion equation
   21,535.86 : 32,297.55 = 8,385.30 : x
2. Step 2: Convert to fraction form
   21,535.86/32,297.55 = 8,385.30/x
3. Step 3: Cross multiply
   21,535.86x = 32,297.55 × 8,385.30
4. Step 4: Simplify right side
   21,535.86x = 270,824,646.02
5. Step 5: Solve for x
   x = 270,824,646.02/21,535.86
6. Step 6: Final answer
   x = 12,575.52