Finding the Third Proportional to 407,719 and 921,142

Step by Step Solution

1. Step 1: Write the proportion equation
   407,719 : 921,142 = 921,142 : x
2. Step 2: Convert to fraction form
   407,719/921,142 = 921,142/x
3. Step 3: Cross multiply
   407,719x = 921,142 × 921,142
4. Step 4: Simplify right side
   407,719x = 848,502,584,164
5. Step 5: Solve for x
   x = 848,502,584,164/407,719
6. Step 6: Final answer
   x = 2,081,096.50