Finding the Fourth Proportional to 5,150.27, 7,724.47 and 1,640.65

Step by Step Solution

1. Step 1: Write the proportion equation
   5,150.27 : 7,724.47 = 1,640.65 : x
2. Step 2: Convert to fraction form
   5,150.27/7,724.47 = 1,640.65/x
3. Step 3: Cross multiply
   5,150.27x = 7,724.47 × 1,640.65
4. Step 4: Simplify right side
   5,150.27x = 12,673,151.71
5. Step 5: Solve for x
   x = 12,673,151.71/5,150.27
6. Step 6: Final answer
   x = 2,460.68