Finding the Third Proportional to 398,359.50 and 863,167.50

Step by Step Solution

1. Step 1: Write the proportion equation
   398,359.50 : 863,167.50 = 863,167.50 : x
2. Step 2: Convert to fraction form
   398,359.50/863,167.50 = 863,167.50/x
3. Step 3: Cross multiply
   398,359.50x = 863,167.50 × 863,167.50
4. Step 4: Simplify right side
   398,359.50x = 745,058,133,056.25
5. Step 5: Solve for x
   x = 745,058,133,056.25/398,359.50
6. Step 6: Final answer
   x = 1,870,315.97