Finding the Third Proportional to 64,298 and 139,288

Step by Step Solution

1. Step 1: Write the proportion equation
   64,298 : 139,288 = 139,288 : x
2. Step 2: Convert to fraction form
   64,298/139,288 = 139,288/x
3. Step 3: Cross multiply
   64,298x = 139,288 × 139,288
4. Step 4: Simplify right side
   64,298x = 19,401,146,944
5. Step 5: Solve for x
   x = 19,401,146,944/64,298
6. Step 6: Final answer
   x = 301,737.95