Finding the Fourth Proportional to 2,828.07, 4,241.27 and 978.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,828.07 : 4,241.27 = 978.70 : x
2. Step 2: Convert to fraction form
   2,828.07/4,241.27 = 978.70/x
3. Step 3: Cross multiply
   2,828.07x = 4,241.27 × 978.70
4. Step 4: Simplify right side
   2,828.07x = 4,150,930.95
5. Step 5: Solve for x
   x = 4,150,930.95/2,828.07
6. Step 6: Final answer
   x = 1,467.76