Finding the Third Proportional to 1,047,648 and 1,638,864

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047,648 : 1,638,864 = 1,638,864 : x
2. Step 2: Convert to fraction form
   1,047,648/1,638,864 = 1,638,864/x
3. Step 3: Cross multiply
   1,047,648x = 1,638,864 × 1,638,864
4. Step 4: Simplify right side
   1,047,648x = 2,685,875,210,496
5. Step 5: Solve for x
   x = 2,685,875,210,496/1,047,648
6. Step 6: Final answer
   x = 2,563,719.12