Finding the Third Proportional to 1,511,721 and 3,289,140

Step by Step Solution

1. Step 1: Write the proportion equation
   1,511,721 : 3,289,140 = 3,289,140 : x
2. Step 2: Convert to fraction form
   1,511,721/3,289,140 = 3,289,140/x
3. Step 3: Cross multiply
   1,511,721x = 3,289,140 × 3,289,140
4. Step 4: Simplify right side
   1,511,721x = 10,818,441,939,600
5. Step 5: Solve for x
   x = 10,818,441,939,600/1,511,721
6. Step 6: Final answer
   x = 7,156,374.71