Finding the Fourth Proportional to 2,164.13, 2,986.71 and 1,280.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,164.13 : 2,986.71 = 1,280.22 : x
2. Step 2: Convert to fraction form
   2,164.13/2,986.71 = 1,280.22/x
3. Step 3: Cross multiply
   2,164.13x = 2,986.71 × 1,280.22
4. Step 4: Simplify right side
   2,164.13x = 3,823,627.74
5. Step 5: Solve for x
   x = 3,823,627.74/2,164.13
6. Step 6: Final answer
   x = 1,766.82