Finding the Fourth Proportional to 2,761.25, 4,142.33 and 912.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,761.25 : 4,142.33 = 912.47 : x
2. Step 2: Convert to fraction form
   2,761.25/4,142.33 = 912.47/x
3. Step 3: Cross multiply
   2,761.25x = 4,142.33 × 912.47
4. Step 4: Simplify right side
   2,761.25x = 3,779,751.86
5. Step 5: Solve for x
   x = 3,779,751.86/2,761.25
6. Step 6: Final answer
   x = 1,368.86