Finding the Third Proportional to 13,878 and 21,281

Step by Step Solution

1. Step 1: Write the proportion equation
   13,878 : 21,281 = 21,281 : x
2. Step 2: Convert to fraction form
   13,878/21,281 = 21,281/x
3. Step 3: Cross multiply
   13,878x = 21,281 × 21,281
4. Step 4: Simplify right side
   13,878x = 452,880,961
5. Step 5: Solve for x
   x = 452,880,961/13,878
6. Step 6: Final answer
   x = 32,633.01