Finding the Fourth Proportional to 6,418.69, 8,857.72 and 3,586.12

Step by Step Solution

1. Step 1: Write the proportion equation
   6,418.69 : 8,857.72 = 3,586.12 : x
2. Step 2: Convert to fraction form
   6,418.69/8,857.72 = 3,586.12/x
3. Step 3: Cross multiply
   6,418.69x = 8,857.72 × 3,586.12
4. Step 4: Simplify right side
   6,418.69x = 31,764,837.88
5. Step 5: Solve for x
   x = 31,764,837.88/6,418.69
6. Step 6: Final answer
   x = 4,948.80