Finding the Third Proportional to 900,864 and 1,978,911

Step by Step Solution

1. Step 1: Write the proportion equation
   900,864 : 1,978,911 = 1,978,911 : x
2. Step 2: Convert to fraction form
   900,864/1,978,911 = 1,978,911/x
3. Step 3: Cross multiply
   900,864x = 1,978,911 × 1,978,911
4. Step 4: Simplify right side
   900,864x = 3,916,088,745,921
5. Step 5: Solve for x
   x = 3,916,088,745,921/900,864
6. Step 6: Final answer
   x = 4,347,036.56