Finding the Fourth Proportional to 2,168.33, 3,245.52 and 1,428.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,168.33 : 3,245.52 = 1,428.56 : x
2. Step 2: Convert to fraction form
   2,168.33/3,245.52 = 1,428.56/x
3. Step 3: Cross multiply
   2,168.33x = 3,245.52 × 1,428.56
4. Step 4: Simplify right side
   2,168.33x = 4,636,399.65
5. Step 5: Solve for x
   x = 4,636,399.65/2,168.33
6. Step 6: Final answer
   x = 2,138.23