Finding the Fourth Proportional to 2,042.51, 3,061.37 and 872.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,042.51 : 3,061.37 = 872.15 : x
2. Step 2: Convert to fraction form
   2,042.51/3,061.37 = 872.15/x
3. Step 3: Cross multiply
   2,042.51x = 3,061.37 × 872.15
4. Step 4: Simplify right side
   2,042.51x = 2,669,969.48
5. Step 5: Solve for x
   x = 2,669,969.48/2,042.51
6. Step 6: Final answer
   x = 1,307.20