Finding the Third Proportional to 1,584,384 and 3,421,288

Step by Step Solution

1. Step 1: Write the proportion equation
   1,584,384 : 3,421,288 = 3,421,288 : x
2. Step 2: Convert to fraction form
   1,584,384/3,421,288 = 3,421,288/x
3. Step 3: Cross multiply
   1,584,384x = 3,421,288 × 3,421,288
4. Step 4: Simplify right side
   1,584,384x = 11,705,211,578,944
5. Step 5: Solve for x
   x = 11,705,211,578,944/1,584,384
6. Step 6: Final answer
   x = 7,387,862.78