Finding the Fourth Proportional to 12,123.45, 18,168.59 and 9,159.46

Step by Step Solution

1. Step 1: Write the proportion equation
   12,123.45 : 18,168.59 = 9,159.46 : x
2. Step 2: Convert to fraction form
   12,123.45/18,168.59 = 9,159.46/x
3. Step 3: Cross multiply
   12,123.45x = 18,168.59 × 9,159.46
4. Step 4: Simplify right side
   12,123.45x = 166,414,473.36
5. Step 5: Solve for x
   x = 166,414,473.36/12,123.45
6. Step 6: Final answer
   x = 13,726.66