Finding the Third Proportional to 21,185 and 28,245

Step by Step Solution

1. Step 1: Write the proportion equation
   21,185 : 28,245 = 28,245 : x
2. Step 2: Convert to fraction form
   21,185/28,245 = 28,245/x
3. Step 3: Cross multiply
   21,185x = 28,245 × 28,245
4. Step 4: Simplify right side
   21,185x = 797,780,025
5. Step 5: Solve for x
   x = 797,780,025/21,185
6. Step 6: Final answer
   x = 37,657.78