Finding the Third Proportional to 5,421,844 and 7,228,320

Step by Step Solution

1. Step 1: Write the proportion equation
   5,421,844 : 7,228,320 = 7,228,320 : x
2. Step 2: Convert to fraction form
   5,421,844/7,228,320 = 7,228,320/x
3. Step 3: Cross multiply
   5,421,844x = 7,228,320 × 7,228,320
4. Step 4: Simplify right side
   5,421,844x = 52,248,610,022,400
5. Step 5: Solve for x
   x = 52,248,610,022,400/5,421,844
6. Step 6: Final answer
   x = 9,636,686.34