Finding the Fourth Proportional to 2,164.18, 2,986.39 and 1,279.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,164.18 : 2,986.39 = 1,279.83 : x
2. Step 2: Convert to fraction form
   2,164.18/2,986.39 = 1,279.83/x
3. Step 3: Cross multiply
   2,164.18x = 2,986.39 × 1,279.83
4. Step 4: Simplify right side
   2,164.18x = 3,822,071.51
5. Step 5: Solve for x
   x = 3,822,071.51/2,164.18
6. Step 6: Final answer
   x = 1,766.06