Finding the Fourth Proportional to 2,428.57, 3,350.32 and 2,149.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,428.57 : 3,350.32 = 2,149.12 : x
2. Step 2: Convert to fraction form
   2,428.57/3,350.32 = 2,149.12/x
3. Step 3: Cross multiply
   2,428.57x = 3,350.32 × 2,149.12
4. Step 4: Simplify right side
   2,428.57x = 7,200,239.72
5. Step 5: Solve for x
   x = 7,200,239.72/2,428.57
6. Step 6: Final answer
   x = 2,964.81