Finding the Third Proportional to 2,179,915 and 5,091,644

Step by Step Solution

1. Step 1: Write the proportion equation
   2,179,915 : 5,091,644 = 5,091,644 : x
2. Step 2: Convert to fraction form
   2,179,915/5,091,644 = 5,091,644/x
3. Step 3: Cross multiply
   2,179,915x = 5,091,644 × 5,091,644
4. Step 4: Simplify right side
   2,179,915x = 25,924,838,622,736
5. Step 5: Solve for x
   x = 25,924,838,622,736/2,179,915
6. Step 6: Final answer
   x = 11,892,591.51