Finding the Fourth Proportional to 21,613.98, 32,425.83 and 15,638.61

Step by Step Solution

1. Step 1: Write the proportion equation
   21,613.98 : 32,425.83 = 15,638.61 : x
2. Step 2: Convert to fraction form
   21,613.98/32,425.83 = 15,638.61/x
3. Step 3: Cross multiply
   21,613.98x = 32,425.83 × 15,638.61
4. Step 4: Simplify right side
   21,613.98x = 507,094,909.30
5. Step 5: Solve for x
   x = 507,094,909.30/21,613.98
6. Step 6: Final answer
   x = 23,461.43