Finding the Fourth Proportional to 2,540.82, 3,810.45 and 980.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,540.82 : 3,810.45 = 980.70 : x
2. Step 2: Convert to fraction form
   2,540.82/3,810.45 = 980.70/x
3. Step 3: Cross multiply
   2,540.82x = 3,810.45 × 980.70
4. Step 4: Simplify right side
   2,540.82x = 3,736,908.32
5. Step 5: Solve for x
   x = 3,736,908.32/2,540.82
6. Step 6: Final answer
   x = 1,470.75