Finding the Third Proportional to 905,287 and 1,978,730

Step by Step Solution

1. Step 1: Write the proportion equation
   905,287 : 1,978,730 = 1,978,730 : x
2. Step 2: Convert to fraction form
   905,287/1,978,730 = 1,978,730/x
3. Step 3: Cross multiply
   905,287x = 1,978,730 × 1,978,730
4. Step 4: Simplify right side
   905,287x = 3,915,372,412,900
5. Step 5: Solve for x
   x = 3,915,372,412,900/905,287
6. Step 6: Final answer
   x = 4,325,006.78