Finding the Fourth Proportional to 9,216.89, 12,722.03 and 7,971.33

Step by Step Solution

1. Step 1: Write the proportion equation
   9,216.89 : 12,722.03 = 7,971.33 : x
2. Step 2: Convert to fraction form
   9,216.89/12,722.03 = 7,971.33/x
3. Step 3: Cross multiply
   9,216.89x = 12,722.03 × 7,971.33
4. Step 4: Simplify right side
   9,216.89x = 101,411,499.40
5. Step 5: Solve for x
   x = 101,411,499.40/9,216.89
6. Step 6: Final answer
   x = 11,002.79