Finding the Fourth Proportional to 2,142.73, 3,215.31 and 1,412.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.73 : 3,215.31 = 1,412.65 : x
2. Step 2: Convert to fraction form
   2,142.73/3,215.31 = 1,412.65/x
3. Step 3: Cross multiply
   2,142.73x = 3,215.31 × 1,412.65
4. Step 4: Simplify right side
   2,142.73x = 4,542,107.67
5. Step 5: Solve for x
   x = 4,542,107.67/2,142.73
6. Step 6: Final answer
   x = 2,119.78