Finding the Third Proportional to 303,407 and 665,132.50

Step by Step Solution

1. Step 1: Write the proportion equation
   303,407 : 665,132.50 = 665,132.50 : x
2. Step 2: Convert to fraction form
   303,407/665,132.50 = 665,132.50/x
3. Step 3: Cross multiply
   303,407x = 665,132.50 × 665,132.50
4. Step 4: Simplify right side
   303,407x = 442,401,242,556.25
5. Step 5: Solve for x
   x = 442,401,242,556.25/303,407
6. Step 6: Final answer
   x = 1,458,111.52