Finding the Third Proportional to 161,866.50 and 355,860

Step by Step Solution

1. Step 1: Write the proportion equation
   161,866.50 : 355,860 = 355,860 : x
2. Step 2: Convert to fraction form
   161,866.50/355,860 = 355,860/x
3. Step 3: Cross multiply
   161,866.50x = 355,860 × 355,860
4. Step 4: Simplify right side
   161,866.50x = 126,636,339,600
5. Step 5: Solve for x
   x = 126,636,339,600/161,866.50
6. Step 6: Final answer
   x = 782,350.51