Finding the Third Proportional to 57,269 and 86,012

Step by Step Solution

1. Step 1: Write the proportion equation
   57,269 : 86,012 = 86,012 : x
2. Step 2: Convert to fraction form
   57,269/86,012 = 86,012/x
3. Step 3: Cross multiply
   57,269x = 86,012 × 86,012
4. Step 4: Simplify right side
   57,269x = 7,398,064,144
5. Step 5: Solve for x
   x = 7,398,064,144/57,269
6. Step 6: Final answer
   x = 129,180.96