Finding the Third Proportional to 1,209,138 and 2,639,324

Step by Step Solution

1. Step 1: Write the proportion equation
   1,209,138 : 2,639,324 = 2,639,324 : x
2. Step 2: Convert to fraction form
   1,209,138/2,639,324 = 2,639,324/x
3. Step 3: Cross multiply
   1,209,138x = 2,639,324 × 2,639,324
4. Step 4: Simplify right side
   1,209,138x = 6,966,031,176,976
5. Step 5: Solve for x
   x = 6,966,031,176,976/1,209,138
6. Step 6: Final answer
   x = 5,761,154.79