Finding the Third Proportional to 8,808.50 and 12,861.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,808.50 : 12,861.50 = 12,861.50 : x
2. Step 2: Convert to fraction form
   8,808.50/12,861.50 = 12,861.50/x
3. Step 3: Cross multiply
   8,808.50x = 12,861.50 × 12,861.50
4. Step 4: Simplify right side
   8,808.50x = 165,418,182.25
5. Step 5: Solve for x
   x = 165,418,182.25/8,808.50
6. Step 6: Final answer
   x = 18,779.38