Finding the Fourth Proportional to 2,076.58, 3,115.63 and 980.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,076.58 : 3,115.63 = 980.12 : x
2. Step 2: Convert to fraction form
   2,076.58/3,115.63 = 980.12/x
3. Step 3: Cross multiply
   2,076.58x = 3,115.63 × 980.12
4. Step 4: Simplify right side
   2,076.58x = 3,053,700.29
5. Step 5: Solve for x
   x = 3,053,700.29/2,076.58
6. Step 6: Final answer
   x = 1,470.54