Finding the Fourth Proportional to 16,416.15, 24,587.78 and 13,500.15

Step by Step Solution

1. Step 1: Write the proportion equation
   16,416.15 : 24,587.78 = 13,500.15 : x
2. Step 2: Convert to fraction form
   16,416.15/24,587.78 = 13,500.15/x
3. Step 3: Cross multiply
   16,416.15x = 24,587.78 × 13,500.15
4. Step 4: Simplify right side
   16,416.15x = 331,938,650.67
5. Step 5: Solve for x
   x = 331,938,650.67/16,416.15
6. Step 6: Final answer
   x = 20,220.25