Finding the Fourth Proportional to 6,456.43, 8,910.17 and 5,056.75

Step by Step Solution

1. Step 1: Write the proportion equation
   6,456.43 : 8,910.17 = 5,056.75 : x
2. Step 2: Convert to fraction form
   6,456.43/8,910.17 = 5,056.75/x
3. Step 3: Cross multiply
   6,456.43x = 8,910.17 × 5,056.75
4. Step 4: Simplify right side
   6,456.43x = 45,056,502.15
5. Step 5: Solve for x
   x = 45,056,502.15/6,456.43
6. Step 6: Final answer
   x = 6,978.55