Finding the Third Proportional to 398,197 and 616,556.50

Step by Step Solution

1. Step 1: Write the proportion equation
   398,197 : 616,556.50 = 616,556.50 : x
2. Step 2: Convert to fraction form
   398,197/616,556.50 = 616,556.50/x
3. Step 3: Cross multiply
   398,197x = 616,556.50 × 616,556.50
4. Step 4: Simplify right side
   398,197x = 380,141,917,692.25
5. Step 5: Solve for x
   x = 380,141,917,692.25/398,197
6. Step 6: Final answer
   x = 954,657.91