Finding the Third Proportional to 145,020.38 and 311,462.72

Step by Step Solution

1. Step 1: Write the proportion equation
   145,020.38 : 311,462.72 = 311,462.72 : x
2. Step 2: Convert to fraction form
   145,020.38/311,462.72 = 311,462.72/x
3. Step 3: Cross multiply
   145,020.38x = 311,462.72 × 311,462.72
4. Step 4: Simplify right side
   145,020.38x = 97,009,025,171.14
5. Step 5: Solve for x
   x = 97,009,025,171.14/145,020.38
6. Step 6: Final answer
   x = 668,933.76