Finding the Third Proportional to 900,344 and 1,921,216

Step by Step Solution

1. Step 1: Write the proportion equation
   900,344 : 1,921,216 = 1,921,216 : x
2. Step 2: Convert to fraction form
   900,344/1,921,216 = 1,921,216/x
3. Step 3: Cross multiply
   900,344x = 1,921,216 × 1,921,216
4. Step 4: Simplify right side
   900,344x = 3,691,070,918,656
5. Step 5: Solve for x
   x = 3,691,070,918,656/900,344
6. Step 6: Final answer
   x = 4,099,622.94