Finding the Fourth Proportional to 1,078.72, 1,610.72 and 1,009.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.72 : 1,610.72 = 1,009.04 : x
2. Step 2: Convert to fraction form
   1,078.72/1,610.72 = 1,009.04/x
3. Step 3: Cross multiply
   1,078.72x = 1,610.72 × 1,009.04
4. Step 4: Simplify right side
   1,078.72x = 1,625,280.91
5. Step 5: Solve for x
   x = 1,625,280.91/1,078.72
6. Step 6: Final answer
   x = 1,506.68