Finding the Third Proportional to 142,731 and 307,385

Step by Step Solution

1. Step 1: Write the proportion equation
   142,731 : 307,385 = 307,385 : x
2. Step 2: Convert to fraction form
   142,731/307,385 = 307,385/x
3. Step 3: Cross multiply
   142,731x = 307,385 × 307,385
4. Step 4: Simplify right side
   142,731x = 94,485,538,225
5. Step 5: Solve for x
   x = 94,485,538,225/142,731
6. Step 6: Final answer
   x = 661,983.30