Finding the Third Proportional to 165,804.50 and 355,247

Step by Step Solution

1. Step 1: Write the proportion equation
   165,804.50 : 355,247 = 355,247 : x
2. Step 2: Convert to fraction form
   165,804.50/355,247 = 355,247/x
3. Step 3: Cross multiply
   165,804.50x = 355,247 × 355,247
4. Step 4: Simplify right side
   165,804.50x = 126,200,431,009
5. Step 5: Solve for x
   x = 126,200,431,009/165,804.50
6. Step 6: Final answer
   x = 761,139.96