Finding the Third Proportional to 300,226.50 and 646,354.69

Step by Step Solution

1. Step 1: Write the proportion equation
   300,226.50 : 646,354.69 = 646,354.69 : x
2. Step 2: Convert to fraction form
   300,226.50/646,354.69 = 646,354.69/x
3. Step 3: Cross multiply
   300,226.50x = 646,354.69 × 646,354.69
4. Step 4: Simplify right side
   300,226.50x = 417,774,382,053.22
5. Step 5: Solve for x
   x = 417,774,382,053.22/300,226.50
6. Step 6: Final answer
   x = 1,391,530.67