Finding the Fourth Proportional to 16,686.57, 23,007.06 and 12,700.83

Step by Step Solution

1. Step 1: Write the proportion equation
   16,686.57 : 23,007.06 = 12,700.83 : x
2. Step 2: Convert to fraction form
   16,686.57/23,007.06 = 12,700.83/x
3. Step 3: Cross multiply
   16,686.57x = 23,007.06 × 12,700.83
4. Step 4: Simplify right side
   16,686.57x = 292,208,757.86
5. Step 5: Solve for x
   x = 292,208,757.86/16,686.57
6. Step 6: Final answer
   x = 17,511.61