Finding the Third Proportional to 307,165.50 and 661,743

Step by Step Solution

1. Step 1: Write the proportion equation
   307,165.50 : 661,743 = 661,743 : x
2. Step 2: Convert to fraction form
   307,165.50/661,743 = 661,743/x
3. Step 3: Cross multiply
   307,165.50x = 661,743 × 661,743
4. Step 4: Simplify right side
   307,165.50x = 437,903,798,049
5. Step 5: Solve for x
   x = 437,903,798,049/307,165.50
6. Step 6: Final answer
   x = 1,425,628.20