Finding the Third Proportional to 55,182 and 87,687

Step by Step Solution

1. Step 1: Write the proportion equation
   55,182 : 87,687 = 87,687 : x
2. Step 2: Convert to fraction form
   55,182/87,687 = 87,687/x
3. Step 3: Cross multiply
   55,182x = 87,687 × 87,687
4. Step 4: Simplify right side
   55,182x = 7,689,009,969
5. Step 5: Solve for x
   x = 7,689,009,969/55,182
6. Step 6: Final answer
   x = 139,339.10