Finding the Fourth Proportional to 2,081.30, 2,872.18 and 1,137.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.30 : 2,872.18 = 1,137.09 : x
2. Step 2: Convert to fraction form
   2,081.30/2,872.18 = 1,137.09/x
3. Step 3: Cross multiply
   2,081.30x = 2,872.18 × 1,137.09
4. Step 4: Simplify right side
   2,081.30x = 3,265,930.71
5. Step 5: Solve for x
   x = 3,265,930.71/2,081.30
6. Step 6: Final answer
   x = 1,569.18