Finding the Third Proportional to 4,190,816 and 9,149,272

Step by Step Solution

1. Step 1: Write the proportion equation
   4,190,816 : 9,149,272 = 9,149,272 : x
2. Step 2: Convert to fraction form
   4,190,816/9,149,272 = 9,149,272/x
3. Step 3: Cross multiply
   4,190,816x = 9,149,272 × 9,149,272
4. Step 4: Simplify right side
   4,190,816x = 83,709,178,129,984
5. Step 5: Solve for x
   x = 83,709,178,129,984/4,190,816
6. Step 6: Final answer
   x = 19,974,434.13