Finding the Third Proportional to 12,878 and 27,140

Step by Step Solution

1. Step 1: Write the proportion equation
   12,878 : 27,140 = 27,140 : x
2. Step 2: Convert to fraction form
   12,878/27,140 = 27,140/x
3. Step 3: Cross multiply
   12,878x = 27,140 × 27,140
4. Step 4: Simplify right side
   12,878x = 736,579,600
5. Step 5: Solve for x
   x = 736,579,600/12,878
6. Step 6: Final answer
   x = 57,196.74