Finding the Third Proportional to 448,468 and 666,310

Step by Step Solution

1. Step 1: Write the proportion equation
   448,468 : 666,310 = 666,310 : x
2. Step 2: Convert to fraction form
   448,468/666,310 = 666,310/x
3. Step 3: Cross multiply
   448,468x = 666,310 × 666,310
4. Step 4: Simplify right side
   448,468x = 443,969,016,100
5. Step 5: Solve for x
   x = 443,969,016,100/448,468
6. Step 6: Final answer
   x = 989,968.10