Finding the Fourth Proportional to 2,761.24, 4,141.76 and 912.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,761.24 : 4,141.76 = 912.31 : x
2. Step 2: Convert to fraction form
   2,761.24/4,141.76 = 912.31/x
3. Step 3: Cross multiply
   2,761.24x = 4,141.76 × 912.31
4. Step 4: Simplify right side
   2,761.24x = 3,778,569.07
5. Step 5: Solve for x
   x = 3,778,569.07/2,761.24
6. Step 6: Final answer
   x = 1,368.43