Finding the Fourth Proportional to 2,488.29, 3,732.42 and 639.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,488.29 : 3,732.42 = 639.41 : x
2. Step 2: Convert to fraction form
   2,488.29/3,732.42 = 639.41/x
3. Step 3: Cross multiply
   2,488.29x = 3,732.42 × 639.41
4. Step 4: Simplify right side
   2,488.29x = 2,386,528.01
5. Step 5: Solve for x
   x = 2,386,528.01/2,488.29
6. Step 6: Final answer
   x = 959.10