Finding the Third Proportional to 9,613.69 and 12,856.22

Step by Step Solution

1. Step 1: Write the proportion equation
   9,613.69 : 12,856.22 = 12,856.22 : x
2. Step 2: Convert to fraction form
   9,613.69/12,856.22 = 12,856.22/x
3. Step 3: Cross multiply
   9,613.69x = 12,856.22 × 12,856.22
4. Step 4: Simplify right side
   9,613.69x = 165,282,360.55
5. Step 5: Solve for x
   x = 165,282,360.55/9,613.69
6. Step 6: Final answer
   x = 17,192.40