Finding the Fourth Proportional to 3,816.31, 5,264.87 and 2,399.01

Step by Step Solution

1. Step 1: Write the proportion equation
   3,816.31 : 5,264.87 = 2,399.01 : x
2. Step 2: Convert to fraction form
   3,816.31/5,264.87 = 2,399.01/x
3. Step 3: Cross multiply
   3,816.31x = 5,264.87 × 2,399.01
4. Step 4: Simplify right side
   3,816.31x = 12,630,481.78
5. Step 5: Solve for x
   x = 12,630,481.78/3,816.31
6. Step 6: Final answer
   x = 3,309.61