Finding the Third Proportional to 8,818.50 and 13,712.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,818.50 : 13,712.25 = 13,712.25 : x
2. Step 2: Convert to fraction form
   8,818.50/13,712.25 = 13,712.25/x
3. Step 3: Cross multiply
   8,818.50x = 13,712.25 × 13,712.25
4. Step 4: Simplify right side
   8,818.50x = 188,025,800.06
5. Step 5: Solve for x
   x = 188,025,800.06/8,818.50
6. Step 6: Final answer
   x = 21,321.74