Finding the Fourth Proportional to 2,080.76, 3,122.49 and 985.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,080.76 : 3,122.49 = 985.23 : x
2. Step 2: Convert to fraction form
   2,080.76/3,122.49 = 985.23/x
3. Step 3: Cross multiply
   2,080.76x = 3,122.49 × 985.23
4. Step 4: Simplify right side
   2,080.76x = 3,076,370.82
5. Step 5: Solve for x
   x = 3,076,370.82/2,080.76
6. Step 6: Final answer
   x = 1,478.49