Finding the Fourth Proportional to 5,789.31, 7,989.63 and 5,580.18

Step by Step Solution

1. Step 1: Write the proportion equation
   5,789.31 : 7,989.63 = 5,580.18 : x
2. Step 2: Convert to fraction form
   5,789.31/7,989.63 = 5,580.18/x
3. Step 3: Cross multiply
   5,789.31x = 7,989.63 × 5,580.18
4. Step 4: Simplify right side
   5,789.31x = 44,583,573.53
5. Step 5: Solve for x
   x = 44,583,573.53/5,789.31
6. Step 6: Final answer
   x = 7,701.02