Finding the Fourth Proportional to 1,508.72, 2,079.98 and 1,131.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,508.72 : 2,079.98 = 1,131.18 : x
2. Step 2: Convert to fraction form
   1,508.72/2,079.98 = 1,131.18/x
3. Step 3: Cross multiply
   1,508.72x = 2,079.98 × 1,131.18
4. Step 4: Simplify right side
   1,508.72x = 2,352,821.38
5. Step 5: Solve for x
   x = 2,352,821.38/1,508.72
6. Step 6: Final answer
   x = 1,559.48