Finding the Third Proportional to 13,872 and 21,560

Step by Step Solution

1. Step 1: Write the proportion equation
   13,872 : 21,560 = 21,560 : x
2. Step 2: Convert to fraction form
   13,872/21,560 = 21,560/x
3. Step 3: Cross multiply
   13,872x = 21,560 × 21,560
4. Step 4: Simplify right side
   13,872x = 464,833,600
5. Step 5: Solve for x
   x = 464,833,600/13,872
6. Step 6: Final answer
   x = 33,508.77