Finding the Third Proportional to 394,216 and 863,063.50

Step by Step Solution

1. Step 1: Write the proportion equation
   394,216 : 863,063.50 = 863,063.50 : x
2. Step 2: Convert to fraction form
   394,216/863,063.50 = 863,063.50/x
3. Step 3: Cross multiply
   394,216x = 863,063.50 × 863,063.50
4. Step 4: Simplify right side
   394,216x = 744,878,605,032.25
5. Step 5: Solve for x
   x = 744,878,605,032.25/394,216
6. Step 6: Final answer
   x = 1,889,518.96