Finding the Third Proportional to 168,768 and 398,391.75

Step by Step Solution

1. Step 1: Write the proportion equation
   168,768 : 398,391.75 = 398,391.75 : x
2. Step 2: Convert to fraction form
   168,768/398,391.75 = 398,391.75/x
3. Step 3: Cross multiply
   168,768x = 398,391.75 × 398,391.75
4. Step 4: Simplify right side
   168,768x = 158,715,986,468.06
5. Step 5: Solve for x
   x = 158,715,986,468.06/168,768
6. Step 6: Final answer
   x = 940,438.87