Finding the Fourth Proportional to 2,623.68, 3,932.82 and 979.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,623.68 : 3,932.82 = 979.20 : x
2. Step 2: Convert to fraction form
   2,623.68/3,932.82 = 979.20/x
3. Step 3: Cross multiply
   2,623.68x = 3,932.82 × 979.20
4. Step 4: Simplify right side
   2,623.68x = 3,851,017.34
5. Step 5: Solve for x
   x = 3,851,017.34/2,623.68
6. Step 6: Final answer
   x = 1,467.79