Finding the Third Proportional to 132,786.50 and 287,722.50

Step by Step Solution

1. Step 1: Write the proportion equation
   132,786.50 : 287,722.50 = 287,722.50 : x
2. Step 2: Convert to fraction form
   132,786.50/287,722.50 = 287,722.50/x
3. Step 3: Cross multiply
   132,786.50x = 287,722.50 × 287,722.50
4. Step 4: Simplify right side
   132,786.50x = 82,784,237,006.25
5. Step 5: Solve for x
   x = 82,784,237,006.25/132,786.50
6. Step 6: Final answer
   x = 623,438.66