Finding the Third Proportional to 57,709 and 86,942

Step by Step Solution

1. Step 1: Write the proportion equation
   57,709 : 86,942 = 86,942 : x
2. Step 2: Convert to fraction form
   57,709/86,942 = 86,942/x
3. Step 3: Cross multiply
   57,709x = 86,942 × 86,942
4. Step 4: Simplify right side
   57,709x = 7,558,911,364
5. Step 5: Solve for x
   x = 7,558,911,364/57,709
6. Step 6: Final answer
   x = 130,983.23