Finding the Third Proportional to 3,968.63 and 8,715.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,968.63 : 8,715.56 = 8,715.56 : x
2. Step 2: Convert to fraction form
   3,968.63/8,715.56 = 8,715.56/x
3. Step 3: Cross multiply
   3,968.63x = 8,715.56 × 8,715.56
4. Step 4: Simplify right side
   3,968.63x = 75,961,029.69
5. Step 5: Solve for x
   x = 75,961,029.69/3,968.63
6. Step 6: Final answer
   x = 19,140.39