Finding the Third Proportional to 407,712 and 921,123

Step by Step Solution

1. Step 1: Write the proportion equation
   407,712 : 921,123 = 921,123 : x
2. Step 2: Convert to fraction form
   407,712/921,123 = 921,123/x
3. Step 3: Cross multiply
   407,712x = 921,123 × 921,123
4. Step 4: Simplify right side
   407,712x = 848,467,581,129
5. Step 5: Solve for x
   x = 848,467,581,129/407,712
6. Step 6: Final answer
   x = 2,081,046.38