Finding the Third Proportional to 21,870 and 45,198

Step by Step Solution

1. Step 1: Write the proportion equation
   21,870 : 45,198 = 45,198 : x
2. Step 2: Convert to fraction form
   21,870/45,198 = 45,198/x
3. Step 3: Cross multiply
   21,870x = 45,198 × 45,198
4. Step 4: Simplify right side
   21,870x = 2,042,859,204
5. Step 5: Solve for x
   x = 2,042,859,204/21,870
6. Step 6: Final answer
   x = 93,409.20