Finding the Fourth Proportional to 2,081.90, 2,872.87 and 1,242.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.90 : 2,872.87 = 1,242.54 : x
2. Step 2: Convert to fraction form
   2,081.90/2,872.87 = 1,242.54/x
3. Step 3: Cross multiply
   2,081.90x = 2,872.87 × 1,242.54
4. Step 4: Simplify right side
   2,081.90x = 3,569,652.78
5. Step 5: Solve for x
   x = 3,569,652.78/2,081.90
6. Step 6: Final answer
   x = 1,714.61