Finding the Third Proportional to 251,704 and 386,308

Step by Step Solution

1. Step 1: Write the proportion equation
   251,704 : 386,308 = 386,308 : x
2. Step 2: Convert to fraction form
   251,704/386,308 = 386,308/x
3. Step 3: Cross multiply
   251,704x = 386,308 × 386,308
4. Step 4: Simplify right side
   251,704x = 149,233,870,864
5. Step 5: Solve for x
   x = 149,233,870,864/251,704
6. Step 6: Final answer
   x = 592,894.32