Finding the Third Proportional to 639,844 and 1,372,784

Step by Step Solution

1. Step 1: Write the proportion equation
   639,844 : 1,372,784 = 1,372,784 : x
2. Step 2: Convert to fraction form
   639,844/1,372,784 = 1,372,784/x
3. Step 3: Cross multiply
   639,844x = 1,372,784 × 1,372,784
4. Step 4: Simplify right side
   639,844x = 1,884,535,910,656
5. Step 5: Solve for x
   x = 1,884,535,910,656/639,844
6. Step 6: Final answer
   x = 2,945,305.28