Finding the Third Proportional to 645,758 and 1,409,538

Step by Step Solution

1. Step 1: Write the proportion equation
   645,758 : 1,409,538 = 1,409,538 : x
2. Step 2: Convert to fraction form
   645,758/1,409,538 = 1,409,538/x
3. Step 3: Cross multiply
   645,758x = 1,409,538 × 1,409,538
4. Step 4: Simplify right side
   645,758x = 1,986,797,373,444
5. Step 5: Solve for x
   x = 1,986,797,373,444/645,758
6. Step 6: Final answer
   x = 3,076,690.30