Finding the Third Proportional to 8,442 and 12,667.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,442 : 12,667.50 = 12,667.50 : x
2. Step 2: Convert to fraction form
   8,442/12,667.50 = 12,667.50/x
3. Step 3: Cross multiply
   8,442x = 12,667.50 × 12,667.50
4. Step 4: Simplify right side
   8,442x = 160,465,556.25
5. Step 5: Solve for x
   x = 160,465,556.25/8,442
6. Step 6: Final answer
   x = 19,008.00