Finding the Third Proportional to 405,243 and 938,142

Step by Step Solution

1. Step 1: Write the proportion equation
   405,243 : 938,142 = 938,142 : x
2. Step 2: Convert to fraction form
   405,243/938,142 = 938,142/x
3. Step 3: Cross multiply
   405,243x = 938,142 × 938,142
4. Step 4: Simplify right side
   405,243x = 880,110,412,164
5. Step 5: Solve for x
   x = 880,110,412,164/405,243
6. Step 6: Final answer
   x = 2,171,809.04