Finding the Third Proportional to 398,108.25 and 866,200.50

Step by Step Solution

1. Step 1: Write the proportion equation
   398,108.25 : 866,200.50 = 866,200.50 : x
2. Step 2: Convert to fraction form
   398,108.25/866,200.50 = 866,200.50/x
3. Step 3: Cross multiply
   398,108.25x = 866,200.50 × 866,200.50
4. Step 4: Simplify right side
   398,108.25x = 750,303,306,200.25
5. Step 5: Solve for x
   x = 750,303,306,200.25/398,108.25
6. Step 6: Final answer
   x = 1,884,671.58