Finding the Fourth Proportional to 13,123.46, 18,104.68 and 8,340.85

Step by Step Solution

1. Step 1: Write the proportion equation
   13,123.46 : 18,104.68 = 8,340.85 : x
2. Step 2: Convert to fraction form
   13,123.46/18,104.68 = 8,340.85/x
3. Step 3: Cross multiply
   13,123.46x = 18,104.68 × 8,340.85
4. Step 4: Simplify right side
   13,123.46x = 151,008,287.95
5. Step 5: Solve for x
   x = 151,008,287.95/13,123.46
6. Step 6: Final answer
   x = 11,506.75