Finding the Fourth Proportional to 2,162.43, 2,984.02 and 1,278.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,162.43 : 2,984.02 = 1,278.31 : x
2. Step 2: Convert to fraction form
   2,162.43/2,984.02 = 1,278.31/x
3. Step 3: Cross multiply
   2,162.43x = 2,984.02 × 1,278.31
4. Step 4: Simplify right side
   2,162.43x = 3,814,502.61
5. Step 5: Solve for x
   x = 3,814,502.61/2,162.43
6. Step 6: Final answer
   x = 1,763.99