Finding the Fourth Proportional to 2,642.40, 3,956.31 and 1,337.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,642.40 : 3,956.31 = 1,337.49 : x
2. Step 2: Convert to fraction form
   2,642.40/3,956.31 = 1,337.49/x
3. Step 3: Cross multiply
   2,642.40x = 3,956.31 × 1,337.49
4. Step 4: Simplify right side
   2,642.40x = 5,291,525.06
5. Step 5: Solve for x
   x = 5,291,525.06/2,642.40
6. Step 6: Final answer
   x = 2,002.55