Finding the Fourth Proportional to 13,231.92, 18,258.71 and 7,926.60

Step by Step Solution

1. Step 1: Write the proportion equation
   13,231.92 : 18,258.71 = 7,926.60 : x
2. Step 2: Convert to fraction form
   13,231.92/18,258.71 = 7,926.60/x
3. Step 3: Cross multiply
   13,231.92x = 18,258.71 × 7,926.60
4. Step 4: Simplify right side
   13,231.92x = 144,729,490.69
5. Step 5: Solve for x
   x = 144,729,490.69/13,231.92
6. Step 6: Final answer
   x = 10,937.91