Finding the Third Proportional to 618,372 and 1,431,642

Step by Step Solution

1. Step 1: Write the proportion equation
   618,372 : 1,431,642 = 1,431,642 : x
2. Step 2: Convert to fraction form
   618,372/1,431,642 = 1,431,642/x
3. Step 3: Cross multiply
   618,372x = 1,431,642 × 1,431,642
4. Step 4: Simplify right side
   618,372x = 2,049,598,816,164
5. Step 5: Solve for x
   x = 2,049,598,816,164/618,372
6. Step 6: Final answer
   x = 3,314,507.80