Finding the Fourth Proportional to 5,978.72, 8,139.98 and 5,960.18

Step by Step Solution

1. Step 1: Write the proportion equation
   5,978.72 : 8,139.98 = 5,960.18 : x
2. Step 2: Convert to fraction form
   5,978.72/8,139.98 = 5,960.18/x
3. Step 3: Cross multiply
   5,978.72x = 8,139.98 × 5,960.18
4. Step 4: Simplify right side
   5,978.72x = 48,515,746.00
5. Step 5: Solve for x
   x = 48,515,746.00/5,978.72
6. Step 6: Final answer
   x = 8,114.74