Finding the Fourth Proportional to 1,105.98, 1,526.26 and 608.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.98 : 1,526.26 = 608.61 : x
2. Step 2: Convert to fraction form
   1,105.98/1,526.26 = 608.61/x
3. Step 3: Cross multiply
   1,105.98x = 1,526.26 × 608.61
4. Step 4: Simplify right side
   1,105.98x = 928,889.47
5. Step 5: Solve for x
   x = 928,889.47/1,105.98
6. Step 6: Final answer
   x = 839.88