Finding the Third Proportional to 56,816 and 123,608

Step by Step Solution

1. Step 1: Write the proportion equation
   56,816 : 123,608 = 123,608 : x
2. Step 2: Convert to fraction form
   56,816/123,608 = 123,608/x
3. Step 3: Cross multiply
   56,816x = 123,608 × 123,608
4. Step 4: Simplify right side
   56,816x = 15,278,937,664
5. Step 5: Solve for x
   x = 15,278,937,664/56,816
6. Step 6: Final answer
   x = 268,919.63