Finding the Third Proportional to 56,842 and 86,056

Step by Step Solution

1. Step 1: Write the proportion equation
   56,842 : 86,056 = 86,056 : x
2. Step 2: Convert to fraction form
   56,842/86,056 = 86,056/x
3. Step 3: Cross multiply
   56,842x = 86,056 × 86,056
4. Step 4: Simplify right side
   56,842x = 7,405,635,136
5. Step 5: Solve for x
   x = 7,405,635,136/56,842
6. Step 6: Final answer
   x = 130,284.56