Finding the Third Proportional to 309,892 and 478,852

Step by Step Solution

1. Step 1: Write the proportion equation
   309,892 : 478,852 = 478,852 : x
2. Step 2: Convert to fraction form
   309,892/478,852 = 478,852/x
3. Step 3: Cross multiply
   309,892x = 478,852 × 478,852
4. Step 4: Simplify right side
   309,892x = 229,299,237,904
5. Step 5: Solve for x
   x = 229,299,237,904/309,892
6. Step 6: Final answer
   x = 739,932.74