Finding the Third Proportional to 55,739 and 87,308

Step by Step Solution

1. Step 1: Write the proportion equation
   55,739 : 87,308 = 87,308 : x
2. Step 2: Convert to fraction form
   55,739/87,308 = 87,308/x
3. Step 3: Cross multiply
   55,739x = 87,308 × 87,308
4. Step 4: Simplify right side
   55,739x = 7,622,686,864
5. Step 5: Solve for x
   x = 7,622,686,864/55,739
6. Step 6: Final answer
   x = 136,756.79