Finding the Third Proportional to 13,188 and 19,910

Step by Step Solution

1. Step 1: Write the proportion equation
   13,188 : 19,910 = 19,910 : x
2. Step 2: Convert to fraction form
   13,188/19,910 = 19,910/x
3. Step 3: Cross multiply
   13,188x = 19,910 × 19,910
4. Step 4: Simplify right side
   13,188x = 396,408,100
5. Step 5: Solve for x
   x = 396,408,100/13,188
6. Step 6: Final answer
   x = 30,058.24