Finding the Third Proportional to 328,401 and 707,458.50

Step by Step Solution

1. Step 1: Write the proportion equation
   328,401 : 707,458.50 = 707,458.50 : x
2. Step 2: Convert to fraction form
   328,401/707,458.50 = 707,458.50/x
3. Step 3: Cross multiply
   328,401x = 707,458.50 × 707,458.50
4. Step 4: Simplify right side
   328,401x = 500,497,529,222.25
5. Step 5: Solve for x
   x = 500,497,529,222.25/328,401
6. Step 6: Final answer
   x = 1,524,043.86