Finding the Third Proportional to 21,200 and 31,150

Step by Step Solution

1. Step 1: Write the proportion equation
   21,200 : 31,150 = 31,150 : x
2. Step 2: Convert to fraction form
   21,200/31,150 = 31,150/x
3. Step 3: Cross multiply
   21,200x = 31,150 × 31,150
4. Step 4: Simplify right side
   21,200x = 970,322,500
5. Step 5: Solve for x
   x = 970,322,500/21,200
6. Step 6: Final answer
   x = 45,769.93