Finding the Third Proportional to 25,915.50 and 28,399.50

Step by Step Solution

1. Step 1: Write the proportion equation
   25,915.50 : 28,399.50 = 28,399.50 : x
2. Step 2: Convert to fraction form
   25,915.50/28,399.50 = 28,399.50/x
3. Step 3: Cross multiply
   25,915.50x = 28,399.50 × 28,399.50
4. Step 4: Simplify right side
   25,915.50x = 806,531,600.25
5. Step 5: Solve for x
   x = 806,531,600.25/25,915.50
6. Step 6: Final answer
   x = 31,121.59