Finding the Fourth Proportional to 2,658.83, 3,988.82 and 1,015.85

Step by Step Solution

1. Step 1: Write the proportion equation
   2,658.83 : 3,988.82 = 1,015.85 : x
2. Step 2: Convert to fraction form
   2,658.83/3,988.82 = 1,015.85/x
3. Step 3: Cross multiply
   2,658.83x = 3,988.82 × 1,015.85
4. Step 4: Simplify right side
   2,658.83x = 4,052,025.39
5. Step 5: Solve for x
   x = 4,052,025.39/2,658.83
6. Step 6: Final answer
   x = 1,523.99