Finding the Fourth Proportional to 9,123.92, 13,659.40 and 8,174.29

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.92 : 13,659.40 = 8,174.29 : x
2. Step 2: Convert to fraction form
   9,123.92/13,659.40 = 8,174.29/x
3. Step 3: Cross multiply
   9,123.92x = 13,659.40 × 8,174.29
4. Step 4: Simplify right side
   9,123.92x = 111,655,828.53
5. Step 5: Solve for x
   x = 111,655,828.53/9,123.92
6. Step 6: Final answer
   x = 12,237.70