Finding the Third Proportional to 57,138.75 and 86,982.19

Step by Step Solution

1. Step 1: Write the proportion equation
   57,138.75 : 86,982.19 = 86,982.19 : x
2. Step 2: Convert to fraction form
   57,138.75/86,982.19 = 86,982.19/x
3. Step 3: Cross multiply
   57,138.75x = 86,982.19 × 86,982.19
4. Step 4: Simplify right side
   57,138.75x = 7,565,900,942.29
5. Step 5: Solve for x
   x = 7,565,900,942.29/57,138.75
6. Step 6: Final answer
   x = 132,412.78