Finding the Third Proportional to 142,221 and 307,248

Step by Step Solution

1. Step 1: Write the proportion equation
   142,221 : 307,248 = 307,248 : x
2. Step 2: Convert to fraction form
   142,221/307,248 = 307,248/x
3. Step 3: Cross multiply
   142,221x = 307,248 × 307,248
4. Step 4: Simplify right side
   142,221x = 94,401,333,504
5. Step 5: Solve for x
   x = 94,401,333,504/142,221
6. Step 6: Final answer
   x = 663,765.08