Finding the Fourth Proportional to 2,641.38, 3,963.51 and 1,878.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.38 : 3,963.51 = 1,878.18 : x
2. Step 2: Convert to fraction form
   2,641.38/3,963.51 = 1,878.18/x
3. Step 3: Cross multiply
   2,641.38x = 3,963.51 × 1,878.18
4. Step 4: Simplify right side
   2,641.38x = 7,444,185.21
5. Step 5: Solve for x
   x = 7,444,185.21/2,641.38
6. Step 6: Final answer
   x = 2,818.29