Finding the Fourth Proportional to 2,642.78, 3,963.86 and 695.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,642.78 : 3,963.86 = 695.13 : x
2. Step 2: Convert to fraction form
   2,642.78/3,963.86 = 695.13/x
3. Step 3: Cross multiply
   2,642.78x = 3,963.86 × 695.13
4. Step 4: Simplify right side
   2,642.78x = 2,755,406.52
5. Step 5: Solve for x
   x = 2,755,406.52/2,642.78
6. Step 6: Final answer
   x = 1,042.62