Finding the Fourth Proportional to 1,962.72, 2,708.48 and 1,078.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,962.72 : 2,708.48 = 1,078.43 : x
2. Step 2: Convert to fraction form
   1,962.72/2,708.48 = 1,078.43/x
3. Step 3: Cross multiply
   1,962.72x = 2,708.48 × 1,078.43
4. Step 4: Simplify right side
   1,962.72x = 2,920,887.15
5. Step 5: Solve for x
   x = 2,920,887.15/1,962.72
6. Step 6: Final answer
   x = 1,488.18