Finding the Third Proportional to 21,458.50 and 30,957.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,458.50 : 30,957.50 = 30,957.50 : x
2. Step 2: Convert to fraction form
   21,458.50/30,957.50 = 30,957.50/x
3. Step 3: Cross multiply
   21,458.50x = 30,957.50 × 30,957.50
4. Step 4: Simplify right side
   21,458.50x = 958,366,806.25
5. Step 5: Solve for x
   x = 958,366,806.25/21,458.50
6. Step 6: Final answer
   x = 44,661.41