Finding the Fourth Proportional to 2,630.48, 3,940.43 and 1,310.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,630.48 : 3,940.43 = 1,310.25 : x
2. Step 2: Convert to fraction form
   2,630.48/3,940.43 = 1,310.25/x
3. Step 3: Cross multiply
   2,630.48x = 3,940.43 × 1,310.25
4. Step 4: Simplify right side
   2,630.48x = 5,162,941.86
5. Step 5: Solve for x
   x = 5,162,941.86/2,630.48
6. Step 6: Final answer
   x = 1,962.74