Finding the Fourth Proportional to 1,508.72, 2,081.70 and 1,089.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,508.72 : 2,081.70 = 1,089.68 : x
2. Step 2: Convert to fraction form
   1,508.72/2,081.70 = 1,089.68/x
3. Step 3: Cross multiply
   1,508.72x = 2,081.70 × 1,089.68
4. Step 4: Simplify right side
   1,508.72x = 2,268,386.86
5. Step 5: Solve for x
   x = 2,268,386.86/1,508.72
6. Step 6: Final answer
   x = 1,503.52