Finding the Third Proportional to 4,129,378 and 8,891,476

Step by Step Solution

1. Step 1: Write the proportion equation
   4,129,378 : 8,891,476 = 8,891,476 : x
2. Step 2: Convert to fraction form
   4,129,378/8,891,476 = 8,891,476/x
3. Step 3: Cross multiply
   4,129,378x = 8,891,476 × 8,891,476
4. Step 4: Simplify right side
   4,129,378x = 79,058,345,458,576
5. Step 5: Solve for x
   x = 79,058,345,458,576/4,129,378
6. Step 6: Final answer
   x = 19,145,339.92