Finding the Fourth Proportional to 2,646.84, 3,967.69 and 980.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,646.84 : 3,967.69 = 980.49 : x
2. Step 2: Convert to fraction form
   2,646.84/3,967.69 = 980.49/x
3. Step 3: Cross multiply
   2,646.84x = 3,967.69 × 980.49
4. Step 4: Simplify right side
   2,646.84x = 3,890,280.37
5. Step 5: Solve for x
   x = 3,890,280.37/2,646.84
6. Step 6: Final answer
   x = 1,469.78