Finding the Third Proportional to 4,200,380 and 9,160,976

Step by Step Solution

1. Step 1: Write the proportion equation
   4,200,380 : 9,160,976 = 9,160,976 : x
2. Step 2: Convert to fraction form
   4,200,380/9,160,976 = 9,160,976/x
3. Step 3: Cross multiply
   4,200,380x = 9,160,976 × 9,160,976
4. Step 4: Simplify right side
   4,200,380x = 83,923,481,272,576
5. Step 5: Solve for x
   x = 83,923,481,272,576/4,200,380
6. Step 6: Final answer
   x = 19,979,973.54