Finding the Third Proportional to 448,716 and 666,028.50

Step by Step Solution

1. Step 1: Write the proportion equation
   448,716 : 666,028.50 = 666,028.50 : x
2. Step 2: Convert to fraction form
   448,716/666,028.50 = 666,028.50/x
3. Step 3: Cross multiply
   448,716x = 666,028.50 × 666,028.50
4. Step 4: Simplify right side
   448,716x = 443,593,962,812.25
5. Step 5: Solve for x
   x = 443,593,962,812.25/448,716
6. Step 6: Final answer
   x = 988,585.12