Finding the Fourth Proportional to 1,105.86, 1,526.03 and 608.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.86 : 1,526.03 = 608.40 : x
2. Step 2: Convert to fraction form
   1,105.86/1,526.03 = 608.40/x
3. Step 3: Cross multiply
   1,105.86x = 1,526.03 × 608.40
4. Step 4: Simplify right side
   1,105.86x = 928,433.61
5. Step 5: Solve for x
   x = 928,433.61/1,105.86
6. Step 6: Final answer
   x = 839.56