Finding the Fourth Proportional to 2,623.42, 3,932.78 and 980.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,623.42 : 3,932.78 = 980.04 : x
2. Step 2: Convert to fraction form
   2,623.42/3,932.78 = 980.04/x
3. Step 3: Cross multiply
   2,623.42x = 3,932.78 × 980.04
4. Step 4: Simplify right side
   2,623.42x = 3,854,284.16
5. Step 5: Solve for x
   x = 3,854,284.16/2,623.42
6. Step 6: Final answer
   x = 1,469.18