Finding the Third Proportional to 196,440 and 428,863.50

Step by Step Solution

1. Step 1: Write the proportion equation
   196,440 : 428,863.50 = 428,863.50 : x
2. Step 2: Convert to fraction form
   196,440/428,863.50 = 428,863.50/x
3. Step 3: Cross multiply
   196,440x = 428,863.50 × 428,863.50
4. Step 4: Simplify right side
   196,440x = 183,923,901,632.25
5. Step 5: Solve for x
   x = 183,923,901,632.25/196,440
6. Step 6: Final answer
   x = 936,285.39