Finding the Third Proportional to 56,908 and 86,144

Step by Step Solution

1. Step 1: Write the proportion equation
   56,908 : 86,144 = 86,144 : x
2. Step 2: Convert to fraction form
   56,908/86,144 = 86,144/x
3. Step 3: Cross multiply
   56,908x = 86,144 × 86,144
4. Step 4: Simplify right side
   56,908x = 7,420,788,736
5. Step 5: Solve for x
   x = 7,420,788,736/56,908
6. Step 6: Final answer
   x = 130,399.75