Finding the Third Proportional to 310,870 and 480,040.50

Step by Step Solution

1. Step 1: Write the proportion equation
   310,870 : 480,040.50 = 480,040.50 : x
2. Step 2: Convert to fraction form
   310,870/480,040.50 = 480,040.50/x
3. Step 3: Cross multiply
   310,870x = 480,040.50 × 480,040.50
4. Step 4: Simplify right side
   310,870x = 230,438,881,640.25
5. Step 5: Solve for x
   x = 230,438,881,640.25/310,870
6. Step 6: Final answer
   x = 741,270.89