Finding the Fourth Proportional to 8,221.76, 11,346.72 and 7,046.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,221.76 : 11,346.72 = 7,046.72 : x
2. Step 2: Convert to fraction form
   8,221.76/11,346.72 = 7,046.72/x
3. Step 3: Cross multiply
   8,221.76x = 11,346.72 × 7,046.72
4. Step 4: Simplify right side
   8,221.76x = 79,957,158.76
5. Step 5: Solve for x
   x = 79,957,158.76/8,221.76
6. Step 6: Final answer
   x = 9,725.07