Finding the Fourth Proportional to 2,123.57, 3,167.20 and 1,865.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.57 : 3,167.20 = 1,865.27 : x
2. Step 2: Convert to fraction form
   2,123.57/3,167.20 = 1,865.27/x
3. Step 3: Cross multiply
   2,123.57x = 3,167.20 × 1,865.27
4. Step 4: Simplify right side
   2,123.57x = 5,907,683.14
5. Step 5: Solve for x
   x = 5,907,683.14/2,123.57
6. Step 6: Final answer
   x = 2,781.96