Finding the Third Proportional to 8,470.50 and 13,089.75

Step by Step Solution

1. Step 1: Write the proportion equation
   8,470.50 : 13,089.75 = 13,089.75 : x
2. Step 2: Convert to fraction form
   8,470.50/13,089.75 = 13,089.75/x
3. Step 3: Cross multiply
   8,470.50x = 13,089.75 × 13,089.75
4. Step 4: Simplify right side
   8,470.50x = 171,341,555.06
5. Step 5: Solve for x
   x = 171,341,555.06/8,470.50
6. Step 6: Final answer
   x = 20,228.03