Finding the Third Proportional to 1,855,319 and 3,991,108

Step by Step Solution

1. Step 1: Write the proportion equation
   1,855,319 : 3,991,108 = 3,991,108 : x
2. Step 2: Convert to fraction form
   1,855,319/3,991,108 = 3,991,108/x
3. Step 3: Cross multiply
   1,855,319x = 3,991,108 × 3,991,108
4. Step 4: Simplify right side
   1,855,319x = 15,928,943,067,664
5. Step 5: Solve for x
   x = 15,928,943,067,664/1,855,319
6. Step 6: Final answer
   x = 8,585,554.87