Finding the Third Proportional to 398,349 and 863,148.50

Step by Step Solution

1. Step 1: Write the proportion equation
   398,349 : 863,148.50 = 863,148.50 : x
2. Step 2: Convert to fraction form
   398,349/863,148.50 = 863,148.50/x
3. Step 3: Cross multiply
   398,349x = 863,148.50 × 863,148.50
4. Step 4: Simplify right side
   398,349x = 745,025,333,052.25
5. Step 5: Solve for x
   x = 745,025,333,052.25/398,349
6. Step 6: Final answer
   x = 1,870,282.93