Finding the Third Proportional to 331,353 and 715,039.50

Step by Step Solution

1. Step 1: Write the proportion equation
   331,353 : 715,039.50 = 715,039.50 : x
2. Step 2: Convert to fraction form
   331,353/715,039.50 = 715,039.50/x
3. Step 3: Cross multiply
   331,353x = 715,039.50 × 715,039.50
4. Step 4: Simplify right side
   331,353x = 511,281,486,560.25
5. Step 5: Solve for x
   x = 511,281,486,560.25/331,353
6. Step 6: Final answer
   x = 1,543,011.49