Finding the Third Proportional to 13,878 and 20,061

Step by Step Solution

1. Step 1: Write the proportion equation
   13,878 : 20,061 = 20,061 : x
2. Step 2: Convert to fraction form
   13,878/20,061 = 20,061/x
3. Step 3: Cross multiply
   13,878x = 20,061 × 20,061
4. Step 4: Simplify right side
   13,878x = 402,443,721
5. Step 5: Solve for x
   x = 402,443,721/13,878
6. Step 6: Final answer
   x = 28,998.68