Finding the Third Proportional to 7,136 and 12,856

Step by Step Solution

1. Step 1: Write the proportion equation
   7,136 : 12,856 = 12,856 : x
2. Step 2: Convert to fraction form
   7,136/12,856 = 12,856/x
3. Step 3: Cross multiply
   7,136x = 12,856 × 12,856
4. Step 4: Simplify right side
   7,136x = 165,276,736
5. Step 5: Solve for x
   x = 165,276,736/7,136
6. Step 6: Final answer
   x = 23,160.98