Finding the Third Proportional to 56,018 and 86,781

Step by Step Solution

1. Step 1: Write the proportion equation
   56,018 : 86,781 = 86,781 : x
2. Step 2: Convert to fraction form
   56,018/86,781 = 86,781/x
3. Step 3: Cross multiply
   56,018x = 86,781 × 86,781
4. Step 4: Simplify right side
   56,018x = 7,530,941,961
5. Step 5: Solve for x
   x = 7,530,941,961/56,018
6. Step 6: Final answer
   x = 134,437.89