Finding the Third Proportional to 1,289,142 and 2,809,374

Step by Step Solution

1. Step 1: Write the proportion equation
   1,289,142 : 2,809,374 = 2,809,374 : x
2. Step 2: Convert to fraction form
   1,289,142/2,809,374 = 2,809,374/x
3. Step 3: Cross multiply
   1,289,142x = 2,809,374 × 2,809,374
4. Step 4: Simplify right side
   1,289,142x = 7,892,582,271,876
5. Step 5: Solve for x
   x = 7,892,582,271,876/1,289,142
6. Step 6: Final answer
   x = 6,122,352.91