Finding the Third Proportional to 8,604 and 13,288.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,604 : 13,288.50 = 13,288.50 : x
2. Step 2: Convert to fraction form
   8,604/13,288.50 = 13,288.50/x
3. Step 3: Cross multiply
   8,604x = 13,288.50 × 13,288.50
4. Step 4: Simplify right side
   8,604x = 176,584,232.25
5. Step 5: Solve for x
   x = 176,584,232.25/8,604
6. Step 6: Final answer
   x = 20,523.50