Finding the Fourth Proportional to 16,129.34, 24,200.87 and 7,815.55

Step by Step Solution

1. Step 1: Write the proportion equation
   16,129.34 : 24,200.87 = 7,815.55 : x
2. Step 2: Convert to fraction form
   16,129.34/24,200.87 = 7,815.55/x
3. Step 3: Cross multiply
   16,129.34x = 24,200.87 × 7,815.55
4. Step 4: Simplify right side
   16,129.34x = 189,143,109.53
5. Step 5: Solve for x
   x = 189,143,109.53/16,129.34
6. Step 6: Final answer
   x = 11,726.65