Finding the Third Proportional to 617,698 and 921,150

Step by Step Solution

1. Step 1: Write the proportion equation
   617,698 : 921,150 = 921,150 : x
2. Step 2: Convert to fraction form
   617,698/921,150 = 921,150/x
3. Step 3: Cross multiply
   617,698x = 921,150 × 921,150
4. Step 4: Simplify right side
   617,698x = 848,517,322,500
5. Step 5: Solve for x
   x = 848,517,322,500/617,698
6. Step 6: Final answer
   x = 1,373,676.66