Finding the Fourth Proportional to 16,665.16, 24,991.10 and 8,342.20

Step by Step Solution

1. Step 1: Write the proportion equation
   16,665.16 : 24,991.10 = 8,342.20 : x
2. Step 2: Convert to fraction form
   16,665.16/24,991.10 = 8,342.20/x
3. Step 3: Cross multiply
   16,665.16x = 24,991.10 × 8,342.20
4. Step 4: Simplify right side
   16,665.16x = 208,480,754.42
5. Step 5: Solve for x
   x = 208,480,754.42/16,665.16
6. Step 6: Final answer
   x = 12,509.98