Finding the Third Proportional to 56,900 and 86,136

Step by Step Solution

1. Step 1: Write the proportion equation
   56,900 : 86,136 = 86,136 : x
2. Step 2: Convert to fraction form
   56,900/86,136 = 86,136/x
3. Step 3: Cross multiply
   56,900x = 86,136 × 86,136
4. Step 4: Simplify right side
   56,900x = 7,419,410,496
5. Step 5: Solve for x
   x = 7,419,410,496/56,900
6. Step 6: Final answer
   x = 130,393.86