Finding the Fourth Proportional to 3,429.93, 5,131.94 and 3,222.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,429.93 : 5,131.94 = 3,222.57 : x
2. Step 2: Convert to fraction form
   3,429.93/5,131.94 = 3,222.57/x
3. Step 3: Cross multiply
   3,429.93x = 5,131.94 × 3,222.57
4. Step 4: Simplify right side
   3,429.93x = 16,538,019.77
5. Step 5: Solve for x
   x = 16,538,019.77/3,429.93
6. Step 6: Final answer
   x = 4,821.68