Finding the Fourth Proportional to 16,665.62, 22,989.90 and 12,123.19

Step by Step Solution

1. Step 1: Write the proportion equation
   16,665.62 : 22,989.90 = 12,123.19 : x
2. Step 2: Convert to fraction form
   16,665.62/22,989.90 = 12,123.19/x
3. Step 3: Cross multiply
   16,665.62x = 22,989.90 × 12,123.19
4. Step 4: Simplify right side
   16,665.62x = 278,710,868.31
5. Step 5: Solve for x
   x = 278,710,868.31/16,665.62
6. Step 6: Final answer
   x = 16,723.71