Finding the Fourth Proportional to 2,080.79, 3,121.71 and 984.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,080.79 : 3,121.71 = 984.86 : x
2. Step 2: Convert to fraction form
   2,080.79/3,121.71 = 984.86/x
3. Step 3: Cross multiply
   2,080.79x = 3,121.71 × 984.86
4. Step 4: Simplify right side
   2,080.79x = 3,074,439.72
5. Step 5: Solve for x
   x = 3,074,439.72/2,080.79
6. Step 6: Final answer
   x = 1,477.54