Finding the Third Proportional to 55,279.50 and 87,673.25

Step by Step Solution

1. Step 1: Write the proportion equation
   55,279.50 : 87,673.25 = 87,673.25 : x
2. Step 2: Convert to fraction form
   55,279.50/87,673.25 = 87,673.25/x
3. Step 3: Cross multiply
   55,279.50x = 87,673.25 × 87,673.25
4. Step 4: Simplify right side
   55,279.50x = 7,686,598,765.56
5. Step 5: Solve for x
   x = 7,686,598,765.56/55,279.50
6. Step 6: Final answer
   x = 139,049.72