Finding the Third Proportional to 140,915 and 308,979

Step by Step Solution

1. Step 1: Write the proportion equation
   140,915 : 308,979 = 308,979 : x
2. Step 2: Convert to fraction form
   140,915/308,979 = 308,979/x
3. Step 3: Cross multiply
   140,915x = 308,979 × 308,979
4. Step 4: Simplify right side
   140,915x = 95,468,022,441
5. Step 5: Solve for x
   x = 95,468,022,441/140,915
6. Step 6: Final answer
   x = 677,486.59