Finding the Fourth Proportional to 7,891.31, 10,879.98 and 5,586.76

Step by Step Solution

1. Step 1: Write the proportion equation
   7,891.31 : 10,879.98 = 5,586.76 : x
2. Step 2: Convert to fraction form
   7,891.31/10,879.98 = 5,586.76/x
3. Step 3: Cross multiply
   7,891.31x = 10,879.98 × 5,586.76
4. Step 4: Simplify right side
   7,891.31x = 60,783,853.70
5. Step 5: Solve for x
   x = 60,783,853.70/7,891.31
6. Step 6: Final answer
   x = 7,702.63