Finding the Third Proportional to 56,456 and 86,628

Step by Step Solution

1. Step 1: Write the proportion equation
   56,456 : 86,628 = 86,628 : x
2. Step 2: Convert to fraction form
   56,456/86,628 = 86,628/x
3. Step 3: Cross multiply
   56,456x = 86,628 × 86,628
4. Step 4: Simplify right side
   56,456x = 7,504,410,384
5. Step 5: Solve for x
   x = 7,504,410,384/56,456
6. Step 6: Final answer
   x = 132,924.94