Finding the Third Proportional to 8,619.75 and 12,981.94

Step by Step Solution

1. Step 1: Write the proportion equation
   8,619.75 : 12,981.94 = 12,981.94 : x
2. Step 2: Convert to fraction form
   8,619.75/12,981.94 = 12,981.94/x
3. Step 3: Cross multiply
   8,619.75x = 12,981.94 × 12,981.94
4. Step 4: Simplify right side
   8,619.75x = 168,530,701.25
5. Step 5: Solve for x
   x = 168,530,701.25/8,619.75
6. Step 6: Final answer
   x = 19,551.69