Finding the Third Proportional to 1,285,390 and 2,715,260

Step by Step Solution

1. Step 1: Write the proportion equation
   1,285,390 : 2,715,260 = 2,715,260 : x
2. Step 2: Convert to fraction form
   1,285,390/2,715,260 = 2,715,260/x
3. Step 3: Cross multiply
   1,285,390x = 2,715,260 × 2,715,260
4. Step 4: Simplify right side
   1,285,390x = 7,372,636,867,600
5. Step 5: Solve for x
   x = 7,372,636,867,600/1,285,390
6. Step 6: Final answer
   x = 5,735,719.80