Finding the Third Proportional to 21,972 and 51,818.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,972 : 51,818.50 = 51,818.50 : x
2. Step 2: Convert to fraction form
   21,972/51,818.50 = 51,818.50/x
3. Step 3: Cross multiply
   21,972x = 51,818.50 × 51,818.50
4. Step 4: Simplify right side
   21,972x = 2,685,156,942.25
5. Step 5: Solve for x
   x = 2,685,156,942.25/21,972
6. Step 6: Final answer
   x = 122,208.13