Finding the Fourth Proportional to 6,456.06, 8,909.37 and 4,221.72

Step by Step Solution

1. Step 1: Write the proportion equation
   6,456.06 : 8,909.37 = 4,221.72 : x
2. Step 2: Convert to fraction form
   6,456.06/8,909.37 = 4,221.72/x
3. Step 3: Cross multiply
   6,456.06x = 8,909.37 × 4,221.72
4. Step 4: Simplify right side
   6,456.06x = 37,612,865.52
5. Step 5: Solve for x
   x = 37,612,865.52/6,456.06
6. Step 6: Final answer
   x = 5,825.98