Finding the Third Proportional to 398,091 and 616,414.50

Step by Step Solution

1. Step 1: Write the proportion equation
   398,091 : 616,414.50 = 616,414.50 : x
2. Step 2: Convert to fraction form
   398,091/616,414.50 = 616,414.50/x
3. Step 3: Cross multiply
   398,091x = 616,414.50 × 616,414.50
4. Step 4: Simplify right side
   398,091x = 379,966,835,810.25
5. Step 5: Solve for x
   x = 379,966,835,810.25/398,091
6. Step 6: Final answer
   x = 954,472.31