Finding the Fourth Proportional to 5,743.95, 8,610.71 and 3,989.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,743.95 : 8,610.71 = 3,989.78 : x
2. Step 2: Convert to fraction form
   5,743.95/8,610.71 = 3,989.78/x
3. Step 3: Cross multiply
   5,743.95x = 8,610.71 × 3,989.78
4. Step 4: Simplify right side
   5,743.95x = 34,354,805.46
5. Step 5: Solve for x
   x = 34,354,805.46/5,743.95
6. Step 6: Final answer
   x = 5,981.04