Finding the Third Proportional to 19,703 and 42,173

Step by Step Solution

1. Step 1: Write the proportion equation
   19,703 : 42,173 = 42,173 : x
2. Step 2: Convert to fraction form
   19,703/42,173 = 42,173/x
3. Step 3: Cross multiply
   19,703x = 42,173 × 42,173
4. Step 4: Simplify right side
   19,703x = 1,778,561,929
5. Step 5: Solve for x
   x = 1,778,561,929/19,703
6. Step 6: Final answer
   x = 90,268.58