Finding the Fourth Proportional to 9,910.56, 13,676.46 and 5,718.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,910.56 : 13,676.46 = 5,718.72 : x
2. Step 2: Convert to fraction form
   9,910.56/13,676.46 = 5,718.72/x
3. Step 3: Cross multiply
   9,910.56x = 13,676.46 × 5,718.72
4. Step 4: Simplify right side
   9,910.56x = 78,211,845.33
5. Step 5: Solve for x
   x = 78,211,845.33/9,910.56
6. Step 6: Final answer
   x = 7,891.77