Finding the Fourth Proportional to 1,962.20, 2,707.82 and 1,078.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,962.20 : 2,707.82 = 1,078.05 : x
2. Step 2: Convert to fraction form
   1,962.20/2,707.82 = 1,078.05/x
3. Step 3: Cross multiply
   1,962.20x = 2,707.82 × 1,078.05
4. Step 4: Simplify right side
   1,962.20x = 2,919,159.96
5. Step 5: Solve for x
   x = 2,919,159.96/1,962.20
6. Step 6: Final answer
   x = 1,487.70