Finding the Third Proportional to 448,443 and 671,429.25

Step by Step Solution

1. Step 1: Write the proportion equation
   448,443 : 671,429.25 = 671,429.25 : x
2. Step 2: Convert to fraction form
   448,443/671,429.25 = 671,429.25/x
3. Step 3: Cross multiply
   448,443x = 671,429.25 × 671,429.25
4. Step 4: Simplify right side
   448,443x = 450,817,237,755.56
5. Step 5: Solve for x
   x = 450,817,237,755.56/448,443
6. Step 6: Final answer
   x = 1,005,294.40