Finding the Third Proportional to 13,788 and 21,930

Step by Step Solution

1. Step 1: Write the proportion equation
   13,788 : 21,930 = 21,930 : x
2. Step 2: Convert to fraction form
   13,788/21,930 = 21,930/x
3. Step 3: Cross multiply
   13,788x = 21,930 × 21,930
4. Step 4: Simplify right side
   13,788x = 480,924,900
5. Step 5: Solve for x
   x = 480,924,900/13,788
6. Step 6: Final answer
   x = 34,879.96