Finding the Fourth Proportional to 2,540.48, 3,809.10 and 979.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,540.48 : 3,809.10 = 979.62 : x
2. Step 2: Convert to fraction form
   2,540.48/3,809.10 = 979.62/x
3. Step 3: Cross multiply
   2,540.48x = 3,809.10 × 979.62
4. Step 4: Simplify right side
   2,540.48x = 3,731,470.54
5. Step 5: Solve for x
   x = 3,731,470.54/2,540.48
6. Step 6: Final answer
   x = 1,468.81