Finding the Fourth Proportional to 2,391.35, 3,300.48 and 1,646.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.35 : 3,300.48 = 1,646.40 : x
2. Step 2: Convert to fraction form
   2,391.35/3,300.48 = 1,646.40/x
3. Step 3: Cross multiply
   2,391.35x = 3,300.48 × 1,646.40
4. Step 4: Simplify right side
   2,391.35x = 5,433,910.27
5. Step 5: Solve for x
   x = 5,433,910.27/2,391.35
6. Step 6: Final answer
   x = 2,272.32