Finding the Third Proportional to 12,156 and 26,040

Step by Step Solution

1. Step 1: Write the proportion equation
   12,156 : 26,040 = 26,040 : x
2. Step 2: Convert to fraction form
   12,156/26,040 = 26,040/x
3. Step 3: Cross multiply
   12,156x = 26,040 × 26,040
4. Step 4: Simplify right side
   12,156x = 678,081,600
5. Step 5: Solve for x
   x = 678,081,600/12,156
6. Step 6: Final answer
   x = 55,781.64