Finding the Fourth Proportional to 2,761.86, 4,142.88 and 1,007.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,761.86 : 4,142.88 = 1,007.22 : x
2. Step 2: Convert to fraction form
   2,761.86/4,142.88 = 1,007.22/x
3. Step 3: Cross multiply
   2,761.86x = 4,142.88 × 1,007.22
4. Step 4: Simplify right side
   2,761.86x = 4,172,791.59
5. Step 5: Solve for x
   x = 4,172,791.59/2,761.86
6. Step 6: Final answer
   x = 1,510.86