Finding the Third Proportional to 69,903 and 123,039

Step by Step Solution

1. Step 1: Write the proportion equation
   69,903 : 123,039 = 123,039 : x
2. Step 2: Convert to fraction form
   69,903/123,039 = 123,039/x
3. Step 3: Cross multiply
   69,903x = 123,039 × 123,039
4. Step 4: Simplify right side
   69,903x = 15,138,595,521
5. Step 5: Solve for x
   x = 15,138,595,521/69,903
6. Step 6: Final answer
   x = 216,565.75