Finding the Third Proportional to 61,166.50 and 86,136

Step by Step Solution

1. Step 1: Write the proportion equation
   61,166.50 : 86,136 = 86,136 : x
2. Step 2: Convert to fraction form
   61,166.50/86,136 = 86,136/x
3. Step 3: Cross multiply
   61,166.50x = 86,136 × 86,136
4. Step 4: Simplify right side
   61,166.50x = 7,419,410,496
5. Step 5: Solve for x
   x = 7,419,410,496/61,166.50
6. Step 6: Final answer
   x = 121,298.59