Finding the Fourth Proportional to 2,658.83, 3,988.34 and 1,358.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,658.83 : 3,988.34 = 1,358.78 : x
2. Step 2: Convert to fraction form
   2,658.83/3,988.34 = 1,358.78/x
3. Step 3: Cross multiply
   2,658.83x = 3,988.34 × 1,358.78
4. Step 4: Simplify right side
   2,658.83x = 5,419,249.89
5. Step 5: Solve for x
   x = 5,419,249.89/2,658.83
6. Step 6: Final answer
   x = 2,038.21