Finding the Fourth Proportional to 2,828.80, 4,242.23 and 979.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,828.80 : 4,242.23 = 979.48 : x
2. Step 2: Convert to fraction form
   2,828.80/4,242.23 = 979.48/x
3. Step 3: Cross multiply
   2,828.80x = 4,242.23 × 979.48
4. Step 4: Simplify right side
   2,828.80x = 4,155,174.55
5. Step 5: Solve for x
   x = 4,155,174.55/2,828.80
6. Step 6: Final answer
   x = 1,468.88