Finding the Fourth Proportional to 1,080.50, 1,491.23 and 608.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,080.50 : 1,491.23 = 608.42 : x
2. Step 2: Convert to fraction form
   1,080.50/1,491.23 = 608.42/x
3. Step 3: Cross multiply
   1,080.50x = 1,491.23 × 608.42
4. Step 4: Simplify right side
   1,080.50x = 907,283.66
5. Step 5: Solve for x
   x = 907,283.66/1,080.50
6. Step 6: Final answer
   x = 839.69