Finding the Fourth Proportional to 8,087.99, 12,139.72 and 3,930.86

Step by Step Solution

1. Step 1: Write the proportion equation
   8,087.99 : 12,139.72 = 3,930.86 : x
2. Step 2: Convert to fraction form
   8,087.99/12,139.72 = 3,930.86/x
3. Step 3: Cross multiply
   8,087.99x = 12,139.72 × 3,930.86
4. Step 4: Simplify right side
   8,087.99x = 47,719,560.28
5. Step 5: Solve for x
   x = 47,719,560.28/8,087.99
6. Step 6: Final answer
   x = 5,900.06