Finding the Third Proportional to 12,157.50 and 15,535.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,157.50 : 15,535.50 = 15,535.50 : x
2. Step 2: Convert to fraction form
   12,157.50/15,535.50 = 15,535.50/x
3. Step 3: Cross multiply
   12,157.50x = 15,535.50 × 15,535.50
4. Step 4: Simplify right side
   12,157.50x = 241,351,760.25
5. Step 5: Solve for x
   x = 241,351,760.25/12,157.50
6. Step 6: Final answer
   x = 19,852.09