Finding the Fourth Proportional to 2,042.12, 3,061.87 and 872.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,042.12 : 3,061.87 = 872.89 : x
2. Step 2: Convert to fraction form
   2,042.12/3,061.87 = 872.89/x
3. Step 3: Cross multiply
   2,042.12x = 3,061.87 × 872.89
4. Step 4: Simplify right side
   2,042.12x = 2,672,665.87
5. Step 5: Solve for x
   x = 2,672,665.87/2,042.12
6. Step 6: Final answer
   x = 1,308.77