Finding the Third Proportional to 132,738 and 286,606.50

Step by Step Solution

1. Step 1: Write the proportion equation
   132,738 : 286,606.50 = 286,606.50 : x
2. Step 2: Convert to fraction form
   132,738/286,606.50 = 286,606.50/x
3. Step 3: Cross multiply
   132,738x = 286,606.50 × 286,606.50
4. Step 4: Simplify right side
   132,738x = 82,143,285,842.25
5. Step 5: Solve for x
   x = 82,143,285,842.25/132,738
6. Step 6: Final answer
   x = 618,837.75