Finding the Fourth Proportional to 2,025.62, 3,038.73 and 638.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,025.62 : 3,038.73 = 638.81 : x
2. Step 2: Convert to fraction form
   2,025.62/3,038.73 = 638.81/x
3. Step 3: Cross multiply
   2,025.62x = 3,038.73 × 638.81
4. Step 4: Simplify right side
   2,025.62x = 1,941,152.72
5. Step 5: Solve for x
   x = 1,941,152.72/2,025.62
6. Step 6: Final answer
   x = 958.30