Finding the Third Proportional to 8,419.50 and 12,573

Step by Step Solution

1. Step 1: Write the proportion equation
   8,419.50 : 12,573 = 12,573 : x
2. Step 2: Convert to fraction form
   8,419.50/12,573 = 12,573/x
3. Step 3: Cross multiply
   8,419.50x = 12,573 × 12,573
4. Step 4: Simplify right side
   8,419.50x = 158,080,329
5. Step 5: Solve for x
   x = 158,080,329/8,419.50
6. Step 6: Final answer
   x = 18,775.50