Finding the Third Proportional to 296,768 and 638,535.50

Step by Step Solution

1. Step 1: Write the proportion equation
   296,768 : 638,535.50 = 638,535.50 : x
2. Step 2: Convert to fraction form
   296,768/638,535.50 = 638,535.50/x
3. Step 3: Cross multiply
   296,768x = 638,535.50 × 638,535.50
4. Step 4: Simplify right side
   296,768x = 407,727,584,760.25
5. Step 5: Solve for x
   x = 407,727,584,760.25/296,768
6. Step 6: Final answer
   x = 1,373,893.36