Finding the Third Proportional to 643,941 and 1,398,501

Step by Step Solution

1. Step 1: Write the proportion equation
   643,941 : 1,398,501 = 1,398,501 : x
2. Step 2: Convert to fraction form
   643,941/1,398,501 = 1,398,501/x
3. Step 3: Cross multiply
   643,941x = 1,398,501 × 1,398,501
4. Step 4: Simplify right side
   643,941x = 1,955,805,047,001
5. Step 5: Solve for x
   x = 1,955,805,047,001/643,941
6. Step 6: Final answer
   x = 3,037,242.62