Finding the Fourth Proportional to 16,899.72, 25,327.71 and 8,129.85

Step by Step Solution

1. Step 1: Write the proportion equation
   16,899.72 : 25,327.71 = 8,129.85 : x
2. Step 2: Convert to fraction form
   16,899.72/25,327.71 = 8,129.85/x
3. Step 3: Cross multiply
   16,899.72x = 25,327.71 × 8,129.85
4. Step 4: Simplify right side
   16,899.72x = 205,910,483.14
5. Step 5: Solve for x
   x = 205,910,483.14/16,899.72
6. Step 6: Final answer
   x = 12,184.25