Finding the Third Proportional to 336,644.50 and 719,945

Step by Step Solution

1. Step 1: Write the proportion equation
   336,644.50 : 719,945 = 719,945 : x
2. Step 2: Convert to fraction form
   336,644.50/719,945 = 719,945/x
3. Step 3: Cross multiply
   336,644.50x = 719,945 × 719,945
4. Step 4: Simplify right side
   336,644.50x = 518,320,803,025
5. Step 5: Solve for x
   x = 518,320,803,025/336,644.50
6. Step 6: Final answer
   x = 1,539,668.12