Finding the Third Proportional to 132,426.50 and 289,610.50

Step by Step Solution

1. Step 1: Write the proportion equation
   132,426.50 : 289,610.50 = 289,610.50 : x
2. Step 2: Convert to fraction form
   132,426.50/289,610.50 = 289,610.50/x
3. Step 3: Cross multiply
   132,426.50x = 289,610.50 × 289,610.50
4. Step 4: Simplify right side
   132,426.50x = 83,874,241,710.25
5. Step 5: Solve for x
   x = 83,874,241,710.25/132,426.50
6. Step 6: Final answer
   x = 633,364.48