Finding the Fourth Proportional to 2,546.91, 3,819.56 and 986.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,546.91 : 3,819.56 = 986.81 : x
2. Step 2: Convert to fraction form
   2,546.91/3,819.56 = 986.81/x
3. Step 3: Cross multiply
   2,546.91x = 3,819.56 × 986.81
4. Step 4: Simplify right side
   2,546.91x = 3,769,155.97
5. Step 5: Solve for x
   x = 3,769,155.97/2,546.91
6. Step 6: Final answer
   x = 1,479.89