Finding the Fourth Proportional to 2,146.23, 3,209.91 and 1,868.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,146.23 : 3,209.91 = 1,868.31 : x
2. Step 2: Convert to fraction form
   2,146.23/3,209.91 = 1,868.31/x
3. Step 3: Cross multiply
   2,146.23x = 3,209.91 × 1,868.31
4. Step 4: Simplify right side
   2,146.23x = 5,997,106.95
5. Step 5: Solve for x
   x = 5,997,106.95/2,146.23
6. Step 6: Final answer
   x = 2,794.25