Finding the Fourth Proportional to 2,385.33, 3,289.23 and 1,640.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.33 : 3,289.23 = 1,640.37 : x
2. Step 2: Convert to fraction form
   2,385.33/3,289.23 = 1,640.37/x
3. Step 3: Cross multiply
   2,385.33x = 3,289.23 × 1,640.37
4. Step 4: Simplify right side
   2,385.33x = 5,395,554.22
5. Step 5: Solve for x
   x = 5,395,554.22/2,385.33
6. Step 6: Final answer
   x = 2,261.97