Finding the Fourth Proportional to 2,625.90, 3,930.69 and 1,963.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,625.90 : 3,930.69 = 1,963.86 : x
2. Step 2: Convert to fraction form
   2,625.90/3,930.69 = 1,963.86/x
3. Step 3: Cross multiply
   2,625.90x = 3,930.69 × 1,963.86
4. Step 4: Simplify right side
   2,625.90x = 7,719,324.86
5. Step 5: Solve for x
   x = 7,719,324.86/2,625.90
6. Step 6: Final answer
   x = 2,939.69