Finding the Third Proportional to 307,544 and 661,072

Step by Step Solution

1. Step 1: Write the proportion equation
   307,544 : 661,072 = 661,072 : x
2. Step 2: Convert to fraction form
   307,544/661,072 = 661,072/x
3. Step 3: Cross multiply
   307,544x = 661,072 × 661,072
4. Step 4: Simplify right side
   307,544x = 437,016,189,184
5. Step 5: Solve for x
   x = 437,016,189,184/307,544
6. Step 6: Final answer
   x = 1,420,987.53