Finding the Third Proportional to 21,870 and 34,749

Step by Step Solution

1. Step 1: Write the proportion equation
   21,870 : 34,749 = 34,749 : x
2. Step 2: Convert to fraction form
   21,870/34,749 = 34,749/x
3. Step 3: Cross multiply
   21,870x = 34,749 × 34,749
4. Step 4: Simplify right side
   21,870x = 1,207,493,001
5. Step 5: Solve for x
   x = 1,207,493,001/21,870
6. Step 6: Final answer
   x = 55,212.30