Finding the Fourth Proportional to 1,079.31, 1,489.31 and 607.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,079.31 : 1,489.31 = 607.10 : x
2. Step 2: Convert to fraction form
   1,079.31/1,489.31 = 607.10/x
3. Step 3: Cross multiply
   1,079.31x = 1,489.31 × 607.10
4. Step 4: Simplify right side
   1,079.31x = 904,149.62
5. Step 5: Solve for x
   x = 904,149.62/1,079.31
6. Step 6: Final answer
   x = 837.71