Finding the Third Proportional to 617,694 and 921,144

Step by Step Solution

1. Step 1: Write the proportion equation
   617,694 : 921,144 = 921,144 : x
2. Step 2: Convert to fraction form
   617,694/921,144 = 921,144/x
3. Step 3: Cross multiply
   617,694x = 921,144 × 921,144
4. Step 4: Simplify right side
   617,694x = 848,506,268,736
5. Step 5: Solve for x
   x = 848,506,268,736/617,694
6. Step 6: Final answer
   x = 1,373,667.66