Finding the Fourth Proportional to 2,162.54, 2,984.34 and 1,278.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,162.54 : 2,984.34 = 1,278.43 : x
2. Step 2: Convert to fraction form
   2,162.54/2,984.34 = 1,278.43/x
3. Step 3: Cross multiply
   2,162.54x = 2,984.34 × 1,278.43
4. Step 4: Simplify right side
   2,162.54x = 3,815,269.79
5. Step 5: Solve for x
   x = 3,815,269.79/2,162.54
6. Step 6: Final answer
   x = 1,764.25