Finding the Fourth Proportional to 3,930,747.16, 5,422,506.78 and 2,400,205.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,930,747.16 : 5,422,506.78 = 2,400,205.72 : x
2. Step 2: Convert to fraction form
   3,930,747.16/5,422,506.78 = 2,400,205.72/x
3. Step 3: Cross multiply
   3,930,747.16x = 5,422,506.78 × 2,400,205.72
4. Step 4: Simplify right side
   3,930,747.16x = 13,015,131,790,094.78
5. Step 5: Solve for x
   x = 13,015,131,790,094.78/3,930,747.16
6. Step 6: Final answer
   x = 3,311,108.87