Finding the Third Proportional to 8,715.94 and 13,155.75

Step by Step Solution

1. Step 1: Write the proportion equation
   8,715.94 : 13,155.75 = 13,155.75 : x
2. Step 2: Convert to fraction form
   8,715.94/13,155.75 = 13,155.75/x
3. Step 3: Cross multiply
   8,715.94x = 13,155.75 × 13,155.75
4. Step 4: Simplify right side
   8,715.94x = 173,073,758.06
5. Step 5: Solve for x
   x = 173,073,758.06/8,715.94
6. Step 6: Final answer
   x = 19,857.16