Finding the Third Proportional to 428,305.50 and 921,204

Step by Step Solution

1. Step 1: Write the proportion equation
   428,305.50 : 921,204 = 921,204 : x
2. Step 2: Convert to fraction form
   428,305.50/921,204 = 921,204/x
3. Step 3: Cross multiply
   428,305.50x = 921,204 × 921,204
4. Step 4: Simplify right side
   428,305.50x = 848,616,809,616
5. Step 5: Solve for x
   x = 848,616,809,616/428,305.50
6. Step 6: Final answer
   x = 1,981,335.31