Finding the Third Proportional to 140,236 and 308,518

Step by Step Solution

1. Step 1: Write the proportion equation
   140,236 : 308,518 = 308,518 : x
2. Step 2: Convert to fraction form
   140,236/308,518 = 308,518/x
3. Step 3: Cross multiply
   140,236x = 308,518 × 308,518
4. Step 4: Simplify right side
   140,236x = 95,183,356,324
5. Step 5: Solve for x
   x = 95,183,356,324/140,236
6. Step 6: Final answer
   x = 678,736.96