Finding the Fourth Proportional to 2,542.76, 3,816.48 and 1,311.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,542.76 : 3,816.48 = 1,311.02 : x
2. Step 2: Convert to fraction form
   2,542.76/3,816.48 = 1,311.02/x
3. Step 3: Cross multiply
   2,542.76x = 3,816.48 × 1,311.02
4. Step 4: Simplify right side
   2,542.76x = 5,003,481.61
5. Step 5: Solve for x
   x = 5,003,481.61/2,542.76
6. Step 6: Final answer
   x = 1,967.74