Finding the Third Proportional to 8,434 and 12,147.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,434 : 12,147.50 = 12,147.50 : x
2. Step 2: Convert to fraction form
   8,434/12,147.50 = 12,147.50/x
3. Step 3: Cross multiply
   8,434x = 12,147.50 × 12,147.50
4. Step 4: Simplify right side
   8,434x = 147,561,756.25
5. Step 5: Solve for x
   x = 147,561,756.25/8,434
6. Step 6: Final answer
   x = 17,496.06