Finding the Third Proportional to 311,429.25 and 480,945.38

Step by Step Solution

1. Step 1: Write the proportion equation
   311,429.25 : 480,945.38 = 480,945.38 : x
2. Step 2: Convert to fraction form
   311,429.25/480,945.38 = 480,945.38/x
3. Step 3: Cross multiply
   311,429.25x = 480,945.38 × 480,945.38
4. Step 4: Simplify right side
   311,429.25x = 231,308,453,733.89
5. Step 5: Solve for x
   x = 231,308,453,733.89/311,429.25
6. Step 6: Final answer
   x = 742,731.95