Finding the Fourth Proportional to 5,742.76, 8,608.94 and 3,988.59

Step by Step Solution

1. Step 1: Write the proportion equation
   5,742.76 : 8,608.94 = 3,988.59 : x
2. Step 2: Convert to fraction form
   5,742.76/8,608.94 = 3,988.59/x
3. Step 3: Cross multiply
   5,742.76x = 8,608.94 × 3,988.59
4. Step 4: Simplify right side
   5,742.76x = 34,337,550.38
5. Step 5: Solve for x
   x = 34,337,550.38/5,742.76
6. Step 6: Final answer
   x = 5,979.28