Finding the Third Proportional to 663,255 and 1,421,142

Step by Step Solution

1. Step 1: Write the proportion equation
   663,255 : 1,421,142 = 1,421,142 : x
2. Step 2: Convert to fraction form
   663,255/1,421,142 = 1,421,142/x
3. Step 3: Cross multiply
   663,255x = 1,421,142 × 1,421,142
4. Step 4: Simplify right side
   663,255x = 2,019,644,584,164
5. Step 5: Solve for x
   x = 2,019,644,584,164/663,255
6. Step 6: Final answer
   x = 3,045,049.92