Finding the Fourth Proportional to 2,668.80, 3,682.56 and 1,620.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,668.80 : 3,682.56 = 1,620.96 : x
2. Step 2: Convert to fraction form
   2,668.80/3,682.56 = 1,620.96/x
3. Step 3: Cross multiply
   2,668.80x = 3,682.56 × 1,620.96
4. Step 4: Simplify right side
   2,668.80x = 5,969,282.46
5. Step 5: Solve for x
   x = 5,969,282.46/2,668.80
6. Step 6: Final answer
   x = 2,236.69