Finding the Fourth Proportional to 2,680.38, 4,022.61 and 1,864.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,680.38 : 4,022.61 = 1,864.38 : x
2. Step 2: Convert to fraction form
   2,680.38/4,022.61 = 1,864.38/x
3. Step 3: Cross multiply
   2,680.38x = 4,022.61 × 1,864.38
4. Step 4: Simplify right side
   2,680.38x = 7,499,673.63
5. Step 5: Solve for x
   x = 7,499,673.63/2,680.38
6. Step 6: Final answer
   x = 2,797.99