Finding the Fourth Proportional to 1,105.57, 1,525.75 and 608.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.57 : 1,525.75 = 608.25 : x
2. Step 2: Convert to fraction form
   1,105.57/1,525.75 = 608.25/x
3. Step 3: Cross multiply
   1,105.57x = 1,525.75 × 608.25
4. Step 4: Simplify right side
   1,105.57x = 928,035.92
5. Step 5: Solve for x
   x = 928,035.92/1,105.57
6. Step 6: Final answer
   x = 839.42