Finding the Third Proportional to 55,318.50 and 86,433.75

Step by Step Solution

1. Step 1: Write the proportion equation
   55,318.50 : 86,433.75 = 86,433.75 : x
2. Step 2: Convert to fraction form
   55,318.50/86,433.75 = 86,433.75/x
3. Step 3: Cross multiply
   55,318.50x = 86,433.75 × 86,433.75
4. Step 4: Simplify right side
   55,318.50x = 7,470,793,139.06
5. Step 5: Solve for x
   x = 7,470,793,139.06/55,318.50
6. Step 6: Final answer
   x = 135,050.54