Finding the Fourth Proportional to 2,399.68, 3,311.42 and 1,547.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,399.68 : 3,311.42 = 1,547.42 : x
2. Step 2: Convert to fraction form
   2,399.68/3,311.42 = 1,547.42/x
3. Step 3: Cross multiply
   2,399.68x = 3,311.42 × 1,547.42
4. Step 4: Simplify right side
   2,399.68x = 5,124,157.54
5. Step 5: Solve for x
   x = 5,124,157.54/2,399.68
6. Step 6: Final answer
   x = 2,135.35