Finding the Fourth Proportional to 1,105.90, 1,526.15 and 608.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.90 : 1,526.15 = 608.53 : x
2. Step 2: Convert to fraction form
   1,105.90/1,526.15 = 608.53/x
3. Step 3: Cross multiply
   1,105.90x = 1,526.15 × 608.53
4. Step 4: Simplify right side
   1,105.90x = 928,708.63
5. Step 5: Solve for x
   x = 928,708.63/1,105.90
6. Step 6: Final answer
   x = 839.78