Finding the Third Proportional to 8,494.50 and 12,985.75

Step by Step Solution

1. Step 1: Write the proportion equation
   8,494.50 : 12,985.75 = 12,985.75 : x
2. Step 2: Convert to fraction form
   8,494.50/12,985.75 = 12,985.75/x
3. Step 3: Cross multiply
   8,494.50x = 12,985.75 × 12,985.75
4. Step 4: Simplify right side
   8,494.50x = 168,629,703.06
5. Step 5: Solve for x
   x = 168,629,703.06/8,494.50
6. Step 6: Final answer
   x = 19,851.63