Finding the Fourth Proportional to 2,631.48, 3,941.92 and 1,311.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,631.48 : 3,941.92 = 1,311.25 : x
2. Step 2: Convert to fraction form
   2,631.48/3,941.92 = 1,311.25/x
3. Step 3: Cross multiply
   2,631.48x = 3,941.92 × 1,311.25
4. Step 4: Simplify right side
   2,631.48x = 5,168,842.60
5. Step 5: Solve for x
   x = 5,168,842.60/2,631.48
6. Step 6: Final answer
   x = 1,964.23