Finding the Fourth Proportional to 2,928.50, 4,392.26 and 980.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,928.50 : 4,392.26 = 980.69 : x
2. Step 2: Convert to fraction form
   2,928.50/4,392.26 = 980.69/x
3. Step 3: Cross multiply
   2,928.50x = 4,392.26 × 980.69
4. Step 4: Simplify right side
   2,928.50x = 4,307,418.59
5. Step 5: Solve for x
   x = 4,307,418.59/2,928.50
6. Step 6: Final answer
   x = 1,470.86