Finding the Third Proportional to 132,778.50 and 286,686

Step by Step Solution

1. Step 1: Write the proportion equation
   132,778.50 : 286,686 = 286,686 : x
2. Step 2: Convert to fraction form
   132,778.50/286,686 = 286,686/x
3. Step 3: Cross multiply
   132,778.50x = 286,686 × 286,686
4. Step 4: Simplify right side
   132,778.50x = 82,188,862,596
5. Step 5: Solve for x
   x = 82,188,862,596/132,778.50
6. Step 6: Final answer
   x = 618,992.25