Finding the Third Proportional to 8,613.75 and 12,419.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,613.75 : 12,419.25 = 12,419.25 : x
2. Step 2: Convert to fraction form
   8,613.75/12,419.25 = 12,419.25/x
3. Step 3: Cross multiply
   8,613.75x = 12,419.25 × 12,419.25
4. Step 4: Simplify right side
   8,613.75x = 154,237,770.56
5. Step 5: Solve for x
   x = 154,237,770.56/8,613.75
6. Step 6: Final answer
   x = 17,906.00