Finding the Fourth Proportional to 1,105.43, 1,525.50 and 608.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.43 : 1,525.50 = 608.09 : x
2. Step 2: Convert to fraction form
   1,105.43/1,525.50 = 608.09/x
3. Step 3: Cross multiply
   1,105.43x = 1,525.50 × 608.09
4. Step 4: Simplify right side
   1,105.43x = 927,633.67
5. Step 5: Solve for x
   x = 927,633.67/1,105.43
6. Step 6: Final answer
   x = 839.16