Finding the Fourth Proportional to 1,025.98, 1,535.91 and 608.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,025.98 : 1,535.91 = 608.20 : x
2. Step 2: Convert to fraction form
   1,025.98/1,535.91 = 608.20/x
3. Step 3: Cross multiply
   1,025.98x = 1,535.91 × 608.20
4. Step 4: Simplify right side
   1,025.98x = 934,140.46
5. Step 5: Solve for x
   x = 934,140.46/1,025.98
6. Step 6: Final answer
   x = 910.49