Finding the Fourth Proportional to 2,076.22, 3,112.51 and 980.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,076.22 : 3,112.51 = 980.90 : x
2. Step 2: Convert to fraction form
   2,076.22/3,112.51 = 980.90/x
3. Step 3: Cross multiply
   2,076.22x = 3,112.51 × 980.90
4. Step 4: Simplify right side
   2,076.22x = 3,053,061.06
5. Step 5: Solve for x
   x = 3,053,061.06/2,076.22
6. Step 6: Final answer
   x = 1,470.49