Finding the Fourth Proportional to 2,081.31, 2,872.19 and 1,137.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.31 : 2,872.19 = 1,137.10 : x
2. Step 2: Convert to fraction form
   2,081.31/2,872.19 = 1,137.10/x
3. Step 3: Cross multiply
   2,081.31x = 2,872.19 × 1,137.10
4. Step 4: Simplify right side
   2,081.31x = 3,265,967.25
5. Step 5: Solve for x
   x = 3,265,967.25/2,081.31
6. Step 6: Final answer
   x = 1,569.19