Finding the Third Proportional to 311,164.50 and 480,570

Step by Step Solution

1. Step 1: Write the proportion equation
   311,164.50 : 480,570 = 480,570 : x
2. Step 2: Convert to fraction form
   311,164.50/480,570 = 480,570/x
3. Step 3: Cross multiply
   311,164.50x = 480,570 × 480,570
4. Step 4: Simplify right side
   311,164.50x = 230,947,524,900
5. Step 5: Solve for x
   x = 230,947,524,900/311,164.50
6. Step 6: Final answer
   x = 742,203.96