Finding the Third Proportional to 13,099.75 and 18,518.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,099.75 : 18,518.25 = 18,518.25 : x
2. Step 2: Convert to fraction form
   13,099.75/18,518.25 = 18,518.25/x
3. Step 3: Cross multiply
   13,099.75x = 18,518.25 × 18,518.25
4. Step 4: Simplify right side
   13,099.75x = 342,925,583.06
5. Step 5: Solve for x
   x = 342,925,583.06/13,099.75
6. Step 6: Final answer
   x = 26,178.03