Finding the Fourth Proportional to 21,530.72, 32,310.84 and 8,383.16

Step by Step Solution

1. Step 1: Write the proportion equation
   21,530.72 : 32,310.84 = 8,383.16 : x
2. Step 2: Convert to fraction form
   21,530.72/32,310.84 = 8,383.16/x
3. Step 3: Cross multiply
   21,530.72x = 32,310.84 × 8,383.16
4. Step 4: Simplify right side
   21,530.72x = 270,866,941.45
5. Step 5: Solve for x
   x = 270,866,941.45/21,530.72
6. Step 6: Final answer
   x = 12,580.49