Finding the Fourth Proportional to 2,166.33, 2,988.69 and 1,326.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,166.33 : 2,988.69 = 1,326.61 : x
2. Step 2: Convert to fraction form
   2,166.33/2,988.69 = 1,326.61/x
3. Step 3: Cross multiply
   2,166.33x = 2,988.69 × 1,326.61
4. Step 4: Simplify right side
   2,166.33x = 3,964,811.10
5. Step 5: Solve for x
   x = 3,964,811.10/2,166.33
6. Step 6: Final answer
   x = 1,830.20