Finding the Third Proportional to 86,931 and 131,616

Step by Step Solution

1. Step 1: Write the proportion equation
   86,931 : 131,616 = 131,616 : x
2. Step 2: Convert to fraction form
   86,931/131,616 = 131,616/x
3. Step 3: Cross multiply
   86,931x = 131,616 × 131,616
4. Step 4: Simplify right side
   86,931x = 17,322,771,456
5. Step 5: Solve for x
   x = 17,322,771,456/86,931
6. Step 6: Final answer
   x = 199,270.36