Finding the Third Proportional to 123,908 and 263,800

Step by Step Solution

1. Step 1: Write the proportion equation
   123,908 : 263,800 = 263,800 : x
2. Step 2: Convert to fraction form
   123,908/263,800 = 263,800/x
3. Step 3: Cross multiply
   123,908x = 263,800 × 263,800
4. Step 4: Simplify right side
   123,908x = 69,590,440,000
5. Step 5: Solve for x
   x = 69,590,440,000/123,908
6. Step 6: Final answer
   x = 561,629.92