Finding the Third Proportional to 616,840 and 920,142

Step by Step Solution

1. Step 1: Write the proportion equation
   616,840 : 920,142 = 920,142 : x
2. Step 2: Convert to fraction form
   616,840/920,142 = 920,142/x
3. Step 3: Cross multiply
   616,840x = 920,142 × 920,142
4. Step 4: Simplify right side
   616,840x = 846,661,300,164
5. Step 5: Solve for x
   x = 846,661,300,164/616,840
6. Step 6: Final answer
   x = 1,372,578.46