Finding the Fourth Proportional to 3,658.38, 5,048.55 and 1,979.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,658.38 : 5,048.55 = 1,979.78 : x
2. Step 2: Convert to fraction form
   3,658.38/5,048.55 = 1,979.78/x
3. Step 3: Cross multiply
   3,658.38x = 5,048.55 × 1,979.78
4. Step 4: Simplify right side
   3,658.38x = 9,995,018.32
5. Step 5: Solve for x
   x = 9,995,018.32/3,658.38
6. Step 6: Final answer
   x = 2,732.09