Finding the Third Proportional to 57,738 and 86,607

Step by Step Solution

1. Step 1: Write the proportion equation
   57,738 : 86,607 = 86,607 : x
2. Step 2: Convert to fraction form
   57,738/86,607 = 86,607/x
3. Step 3: Cross multiply
   57,738x = 86,607 × 86,607
4. Step 4: Simplify right side
   57,738x = 7,500,772,449
5. Step 5: Solve for x
   x = 7,500,772,449/57,738
6. Step 6: Final answer
   x = 129,910.50