Finding the Third Proportional to 426,537 and 649,021.50

Step by Step Solution

1. Step 1: Write the proportion equation
   426,537 : 649,021.50 = 649,021.50 : x
2. Step 2: Convert to fraction form
   426,537/649,021.50 = 649,021.50/x
3. Step 3: Cross multiply
   426,537x = 649,021.50 × 649,021.50
4. Step 4: Simplify right side
   426,537x = 421,228,907,462.25
5. Step 5: Solve for x
   x = 421,228,907,462.25/426,537
6. Step 6: Final answer
   x = 987,555.38