Finding the Third Proportional to 42,703 and 72,801

Step by Step Solution

1. Step 1: Write the proportion equation
   42,703 : 72,801 = 72,801 : x
2. Step 2: Convert to fraction form
   42,703/72,801 = 72,801/x
3. Step 3: Cross multiply
   42,703x = 72,801 × 72,801
4. Step 4: Simplify right side
   42,703x = 5,299,985,601
5. Step 5: Solve for x
   x = 5,299,985,601/42,703
6. Step 6: Final answer
   x = 124,112.72