Finding the Fourth Proportional to 6,456.65, 8,910.23 and 4,217.18

Step by Step Solution

1. Step 1: Write the proportion equation
   6,456.65 : 8,910.23 = 4,217.18 : x
2. Step 2: Convert to fraction form
   6,456.65/8,910.23 = 4,217.18/x
3. Step 3: Cross multiply
   6,456.65x = 8,910.23 × 4,217.18
4. Step 4: Simplify right side
   6,456.65x = 37,575,978.11
5. Step 5: Solve for x
   x = 37,575,978.11/6,456.65
6. Step 6: Final answer
   x = 5,819.74