Finding the Fourth Proportional to 1,080.01, 1,490.32 and 607.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,080.01 : 1,490.32 = 607.80 : x
2. Step 2: Convert to fraction form
   1,080.01/1,490.32 = 607.80/x
3. Step 3: Cross multiply
   1,080.01x = 1,490.32 × 607.80
4. Step 4: Simplify right side
   1,080.01x = 905,816.50
5. Step 5: Solve for x
   x = 905,816.50/1,080.01
6. Step 6: Final answer
   x = 838.71