Finding the Fourth Proportional to 12,811.41, 17,679.83 and 7,222.41

Step by Step Solution

1. Step 1: Write the proportion equation
   12,811.41 : 17,679.83 = 7,222.41 : x
2. Step 2: Convert to fraction form
   12,811.41/17,679.83 = 7,222.41/x
3. Step 3: Cross multiply
   12,811.41x = 17,679.83 × 7,222.41
4. Step 4: Simplify right side
   12,811.41x = 127,690,944.88
5. Step 5: Solve for x
   x = 127,690,944.88/12,811.41
6. Step 6: Final answer
   x = 9,966.97