Finding the Third Proportional to 19,872 and 30,128

Step by Step Solution

1. Step 1: Write the proportion equation
   19,872 : 30,128 = 30,128 : x
2. Step 2: Convert to fraction form
   19,872/30,128 = 30,128/x
3. Step 3: Cross multiply
   19,872x = 30,128 × 30,128
4. Step 4: Simplify right side
   19,872x = 907,696,384
5. Step 5: Solve for x
   x = 907,696,384/19,872
6. Step 6: Final answer
   x = 45,677.15