Finding the Fourth Proportional to 6,404.98, 8,836.32 and 3,886.16

Step by Step Solution

1. Step 1: Write the proportion equation
   6,404.98 : 8,836.32 = 3,886.16 : x
2. Step 2: Convert to fraction form
   6,404.98/8,836.32 = 3,886.16/x
3. Step 3: Cross multiply
   6,404.98x = 8,836.32 × 3,886.16
4. Step 4: Simplify right side
   6,404.98x = 34,339,333.90
5. Step 5: Solve for x
   x = 34,339,333.90/6,404.98
6. Step 6: Final answer
   x = 5,361.35