Finding the Third Proportional to 55,671 and 86,218.50

Step by Step Solution

1. Step 1: Write the proportion equation
   55,671 : 86,218.50 = 86,218.50 : x
2. Step 2: Convert to fraction form
   55,671/86,218.50 = 86,218.50/x
3. Step 3: Cross multiply
   55,671x = 86,218.50 × 86,218.50
4. Step 4: Simplify right side
   55,671x = 7,433,629,742.25
5. Step 5: Solve for x
   x = 7,433,629,742.25/55,671
6. Step 6: Final answer
   x = 133,527.86