Finding the Third Proportional to 448,563 and 668,956.50

Step by Step Solution

1. Step 1: Write the proportion equation
   448,563 : 668,956.50 = 668,956.50 : x
2. Step 2: Convert to fraction form
   448,563/668,956.50 = 668,956.50/x
3. Step 3: Cross multiply
   448,563x = 668,956.50 × 668,956.50
4. Step 4: Simplify right side
   448,563x = 447,502,798,892.25
5. Step 5: Solve for x
   x = 447,502,798,892.25/448,563
6. Step 6: Final answer
   x = 997,636.45