Finding the Fourth Proportional to 2,081.27, 3,117.72 and 986.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.27 : 3,117.72 = 986.69 : x
2. Step 2: Convert to fraction form
   2,081.27/3,117.72 = 986.69/x
3. Step 3: Cross multiply
   2,081.27x = 3,117.72 × 986.69
4. Step 4: Simplify right side
   2,081.27x = 3,076,223.15
5. Step 5: Solve for x
   x = 3,076,223.15/2,081.27
6. Step 6: Final answer
   x = 1,478.05