Finding the Third Proportional to 21,870.50 and 52,489.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,870.50 : 52,489.25 = 52,489.25 : x
2. Step 2: Convert to fraction form
   21,870.50/52,489.25 = 52,489.25/x
3. Step 3: Cross multiply
   21,870.50x = 52,489.25 × 52,489.25
4. Step 4: Simplify right side
   21,870.50x = 2,755,121,365.56
5. Step 5: Solve for x
   x = 2,755,121,365.56/21,870.50
6. Step 6: Final answer
   x = 125,974.32