Finding the Fourth Proportional to 13,092.61, 18,067.81 and 7,124.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,092.61 : 18,067.81 = 7,124.15 : x
2. Step 2: Convert to fraction form
   13,092.61/18,067.81 = 7,124.15/x
3. Step 3: Cross multiply
   13,092.61x = 18,067.81 × 7,124.15
4. Step 4: Simplify right side
   13,092.61x = 128,717,829.33
5. Step 5: Solve for x
   x = 128,717,829.33/13,092.61
6. Step 6: Final answer
   x = 9,831.33