Finding the Fourth Proportional to 2,076.50, 3,113.22 and 980

Step by Step Solution

1. Step 1: Write the proportion equation
   2,076.50 : 3,113.22 = 980 : x
2. Step 2: Convert to fraction form
   2,076.50/3,113.22 = 980/x
3. Step 3: Cross multiply
   2,076.50x = 3,113.22 × 980
4. Step 4: Simplify right side
   2,076.50x = 3,050,955.60
5. Step 5: Solve for x
   x = 3,050,955.60/2,076.50
6. Step 6: Final answer
   x = 1,469.28