Finding the Fourth Proportional to 2,122.57, 3,165.71 and 1,864.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,122.57 : 3,165.71 = 1,864.27 : x
2. Step 2: Convert to fraction form
   2,122.57/3,165.71 = 1,864.27/x
3. Step 3: Cross multiply
   2,122.57x = 3,165.71 × 1,864.27
4. Step 4: Simplify right side
   2,122.57x = 5,901,738.18
5. Step 5: Solve for x
   x = 5,901,738.18/2,122.57
6. Step 6: Final answer
   x = 2,780.47