Finding the Fourth Proportional to 9,217.39, 12,722.72 and 7,971.83

Step by Step Solution

1. Step 1: Write the proportion equation
   9,217.39 : 12,722.72 = 7,971.83 : x
2. Step 2: Convert to fraction form
   9,217.39/12,722.72 = 7,971.83/x
3. Step 3: Cross multiply
   9,217.39x = 12,722.72 × 7,971.83
4. Step 4: Simplify right side
   9,217.39x = 101,423,360.98
5. Step 5: Solve for x
   x = 101,423,360.98/9,217.39
6. Step 6: Final answer
   x = 11,003.48