Finding the Fourth Proportional to 2,025.56, 3,037.98 and 638.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,025.56 : 3,037.98 = 638.84 : x
2. Step 2: Convert to fraction form
   2,025.56/3,037.98 = 638.84/x
3. Step 3: Cross multiply
   2,025.56x = 3,037.98 × 638.84
4. Step 4: Simplify right side
   2,025.56x = 1,940,783.14
5. Step 5: Solve for x
   x = 1,940,783.14/2,025.56
6. Step 6: Final answer
   x = 958.15