Finding the Fourth Proportional to 8,139.92, 12,190.89 and 5,943.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,139.92 : 12,190.89 = 5,943.20 : x
2. Step 2: Convert to fraction form
   8,139.92/12,190.89 = 5,943.20/x
3. Step 3: Cross multiply
   8,139.92x = 12,190.89 × 5,943.20
4. Step 4: Simplify right side
   8,139.92x = 72,452,897.45
5. Step 5: Solve for x
   x = 72,452,897.45/8,139.92
6. Step 6: Final answer
   x = 8,900.93