Finding the Third Proportional to 8,572.19 and 13,359.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,572.19 : 13,359.50 = 13,359.50 : x
2. Step 2: Convert to fraction form
   8,572.19/13,359.50 = 13,359.50/x
3. Step 3: Cross multiply
   8,572.19x = 13,359.50 × 13,359.50
4. Step 4: Simplify right side
   8,572.19x = 178,476,240.25
5. Step 5: Solve for x
   x = 178,476,240.25/8,572.19
6. Step 6: Final answer
   x = 20,820.38