Finding the Fourth Proportional to 2,828.58, 4,243.50 and 979.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,828.58 : 4,243.50 = 979.72 : x
2. Step 2: Convert to fraction form
   2,828.58/4,243.50 = 979.72/x
3. Step 3: Cross multiply
   2,828.58x = 4,243.50 × 979.72
4. Step 4: Simplify right side
   2,828.58x = 4,157,441.82
5. Step 5: Solve for x
   x = 4,157,441.82/2,828.58
6. Step 6: Final answer
   x = 1,469.80