Finding the Third Proportional to 408,147 and 643,522.50

Step by Step Solution

1. Step 1: Write the proportion equation
   408,147 : 643,522.50 = 643,522.50 : x
2. Step 2: Convert to fraction form
   408,147/643,522.50 = 643,522.50/x
3. Step 3: Cross multiply
   408,147x = 643,522.50 × 643,522.50
4. Step 4: Simplify right side
   408,147x = 414,121,208,006.25
5. Step 5: Solve for x
   x = 414,121,208,006.25/408,147
6. Step 6: Final answer
   x = 1,014,637.39