Finding the Fourth Proportional to 2,763.83, 4,145.78 and 986.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,763.83 : 4,145.78 = 986.30 : x
2. Step 2: Convert to fraction form
   2,763.83/4,145.78 = 986.30/x
3. Step 3: Cross multiply
   2,763.83x = 4,145.78 × 986.30
4. Step 4: Simplify right side
   2,763.83x = 4,088,962.09
5. Step 5: Solve for x
   x = 4,088,962.09/2,763.83
6. Step 6: Final answer
   x = 1,479.46