Finding the Fourth Proportional to 2,081.54, 2,872.59 and 1,242.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.54 : 2,872.59 = 1,242.89 : x
2. Step 2: Convert to fraction form
   2,081.54/2,872.59 = 1,242.89/x
3. Step 3: Cross multiply
   2,081.54x = 2,872.59 × 1,242.89
4. Step 4: Simplify right side
   2,081.54x = 3,570,299.02
5. Step 5: Solve for x
   x = 3,570,299.02/2,081.54
6. Step 6: Final answer
   x = 1,715.22