Finding the Fourth Proportional to 16,665.90, 25,000.18 and 5,572.64

Step by Step Solution

1. Step 1: Write the proportion equation
   16,665.90 : 25,000.18 = 5,572.64 : x
2. Step 2: Convert to fraction form
   16,665.90/25,000.18 = 5,572.64/x
3. Step 3: Cross multiply
   16,665.90x = 25,000.18 × 5,572.64
4. Step 4: Simplify right side
   16,665.90x = 139,317,098.52
5. Step 5: Solve for x
   x = 139,317,098.52/16,665.90
6. Step 6: Final answer
   x = 8,359.41