Finding the Third Proportional to 724,686 and 1,705,143

Step by Step Solution

1. Step 1: Write the proportion equation
   724,686 : 1,705,143 = 1,705,143 : x
2. Step 2: Convert to fraction form
   724,686/1,705,143 = 1,705,143/x
3. Step 3: Cross multiply
   724,686x = 1,705,143 × 1,705,143
4. Step 4: Simplify right side
   724,686x = 2,907,512,650,449
5. Step 5: Solve for x
   x = 2,907,512,650,449/724,686
6. Step 6: Final answer
   x = 4,012,099.93