Finding the Third Proportional to 151,353.38 and 321,155.63

Step by Step Solution

1. Step 1: Write the proportion equation
   151,353.38 : 321,155.63 = 321,155.63 : x
2. Step 2: Convert to fraction form
   151,353.38/321,155.63 = 321,155.63/x
3. Step 3: Cross multiply
   151,353.38x = 321,155.63 × 321,155.63
4. Step 4: Simplify right side
   151,353.38x = 103,140,935,469.14
5. Step 5: Solve for x
   x = 103,140,935,469.14/151,353.38
6. Step 6: Final answer
   x = 681,457.78