Finding the Third Proportional to 331,930.50 and 720,061.50

Step by Step Solution

1. Step 1: Write the proportion equation
   331,930.50 : 720,061.50 = 720,061.50 : x
2. Step 2: Convert to fraction form
   331,930.50/720,061.50 = 720,061.50/x
3. Step 3: Cross multiply
   331,930.50x = 720,061.50 × 720,061.50
4. Step 4: Simplify right side
   331,930.50x = 518,488,563,782.25
5. Step 5: Solve for x
   x = 518,488,563,782.25/331,930.50
6. Step 6: Final answer
   x = 1,562,039.53