Finding the Third Proportional to 432,945 and 644,800.50

Step by Step Solution

1. Step 1: Write the proportion equation
   432,945 : 644,800.50 = 644,800.50 : x
2. Step 2: Convert to fraction form
   432,945/644,800.50 = 644,800.50/x
3. Step 3: Cross multiply
   432,945x = 644,800.50 × 644,800.50
4. Step 4: Simplify right side
   432,945x = 415,767,684,800.25
5. Step 5: Solve for x
   x = 415,767,684,800.25/432,945
6. Step 6: Final answer
   x = 960,324.49