Finding the Fourth Proportional to 12,123.30, 18,233.55 and 10,859.70

Step by Step Solution

1. Step 1: Write the proportion equation
   12,123.30 : 18,233.55 = 10,859.70 : x
2. Step 2: Convert to fraction form
   12,123.30/18,233.55 = 10,859.70/x
3. Step 3: Cross multiply
   12,123.30x = 18,233.55 × 10,859.70
4. Step 4: Simplify right side
   12,123.30x = 198,010,882.94
5. Step 5: Solve for x
   x = 198,010,882.94/12,123.30
6. Step 6: Final answer
   x = 16,333.08