Finding the Third Proportional to 446,401.50 and 638,101.50

Step by Step Solution

1. Step 1: Write the proportion equation
   446,401.50 : 638,101.50 = 638,101.50 : x
2. Step 2: Convert to fraction form
   446,401.50/638,101.50 = 638,101.50/x
3. Step 3: Cross multiply
   446,401.50x = 638,101.50 × 638,101.50
4. Step 4: Simplify right side
   446,401.50x = 407,173,524,302.25
5. Step 5: Solve for x
   x = 407,173,524,302.25/446,401.50
6. Step 6: Final answer
   x = 912,124.01