Finding the Third Proportional to 8,507.25 and 12,940.88

Step by Step Solution

1. Step 1: Write the proportion equation
   8,507.25 : 12,940.88 = 12,940.88 : x
2. Step 2: Convert to fraction form
   8,507.25/12,940.88 = 12,940.88/x
3. Step 3: Cross multiply
   8,507.25x = 12,940.88 × 12,940.88
4. Step 4: Simplify right side
   8,507.25x = 167,466,245.77
5. Step 5: Solve for x
   x = 167,466,245.77/8,507.25
6. Step 6: Final answer
   x = 19,685.12