Finding the Third Proportional to 900,342 and 1,921,212

Step by Step Solution

1. Step 1: Write the proportion equation
   900,342 : 1,921,212 = 1,921,212 : x
2. Step 2: Convert to fraction form
   900,342/1,921,212 = 1,921,212/x
3. Step 3: Cross multiply
   900,342x = 1,921,212 × 1,921,212
4. Step 4: Simplify right side
   900,342x = 3,691,055,548,944
5. Step 5: Solve for x
   x = 3,691,055,548,944/900,342
6. Step 6: Final answer
   x = 4,099,614.98