Finding the Third Proportional to 616,842 and 920,144

Step by Step Solution

1. Step 1: Write the proportion equation
   616,842 : 920,144 = 920,144 : x
2. Step 2: Convert to fraction form
   616,842/920,144 = 920,144/x
3. Step 3: Cross multiply
   616,842x = 920,144 × 920,144
4. Step 4: Simplify right side
   616,842x = 846,664,980,736
5. Step 5: Solve for x
   x = 846,664,980,736/616,842
6. Step 6: Final answer
   x = 1,372,579.98