Finding the Fourth Proportional to 2,301.35, 3,176.55 and 1,640.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,301.35 : 3,176.55 = 1,640.12 : x
2. Step 2: Convert to fraction form
   2,301.35/3,176.55 = 1,640.12/x
3. Step 3: Cross multiply
   2,301.35x = 3,176.55 × 1,640.12
4. Step 4: Simplify right side
   2,301.35x = 5,209,907.30
5. Step 5: Solve for x
   x = 5,209,907.30/2,301.35
6. Step 6: Final answer
   x = 2,263.85