Finding the Third Proportional to 4,191,978 and 8,981,554

Step by Step Solution

1. Step 1: Write the proportion equation
   4,191,978 : 8,981,554 = 8,981,554 : x
2. Step 2: Convert to fraction form
   4,191,978/8,981,554 = 8,981,554/x
3. Step 3: Cross multiply
   4,191,978x = 8,981,554 × 8,981,554
4. Step 4: Simplify right side
   4,191,978x = 80,668,312,254,916
5. Step 5: Solve for x
   x = 80,668,312,254,916/4,191,978
6. Step 6: Final answer
   x = 19,243,496.09