Finding the Fourth Proportional to 3,980.37, 5,491.47 and 2,387.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980.37 : 5,491.47 = 2,387.10 : x
2. Step 2: Convert to fraction form
   3,980.37/5,491.47 = 2,387.10/x
3. Step 3: Cross multiply
   3,980.37x = 5,491.47 × 2,387.10
4. Step 4: Simplify right side
   3,980.37x = 13,108,688.04
5. Step 5: Solve for x
   x = 13,108,688.04/3,980.37
6. Step 6: Final answer
   x = 3,293.33