Finding the Fourth Proportional to 1,105.74, 1,525.78 and 608.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.74 : 1,525.78 = 608.29 : x
2. Step 2: Convert to fraction form
   1,105.74/1,525.78 = 608.29/x
3. Step 3: Cross multiply
   1,105.74x = 1,525.78 × 608.29
4. Step 4: Simplify right side
   1,105.74x = 928,116.72
5. Step 5: Solve for x
   x = 928,116.72/1,105.74
6. Step 6: Final answer
   x = 839.36