Finding the Fourth Proportional to 1,080.34, 1,491.05 and 608.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,080.34 : 1,491.05 = 608.45 : x
2. Step 2: Convert to fraction form
   1,080.34/1,491.05 = 608.45/x
3. Step 3: Cross multiply
   1,080.34x = 1,491.05 × 608.45
4. Step 4: Simplify right side
   1,080.34x = 907,229.37
5. Step 5: Solve for x
   x = 907,229.37/1,080.34
6. Step 6: Final answer
   x = 839.76