Finding the Third Proportional to 30,639 and 42,192

Step by Step Solution

1. Step 1: Write the proportion equation
   30,639 : 42,192 = 42,192 : x
2. Step 2: Convert to fraction form
   30,639/42,192 = 42,192/x
3. Step 3: Cross multiply
   30,639x = 42,192 × 42,192
4. Step 4: Simplify right side
   30,639x = 1,780,164,864
5. Step 5: Solve for x
   x = 1,780,164,864/30,639
6. Step 6: Final answer
   x = 58,101.27