Finding the Third Proportional to 10,986.75 and 15,113.25

Step by Step Solution

1. Step 1: Write the proportion equation
   10,986.75 : 15,113.25 = 15,113.25 : x
2. Step 2: Convert to fraction form
   10,986.75/15,113.25 = 15,113.25/x
3. Step 3: Cross multiply
   10,986.75x = 15,113.25 × 15,113.25
4. Step 4: Simplify right side
   10,986.75x = 228,410,325.56
5. Step 5: Solve for x
   x = 228,410,325.56/10,986.75
6. Step 6: Final answer
   x = 20,789.62