Finding the Fourth Proportional to 9,065.10, 13,596.78 and 3,221.40

Step by Step Solution

1. Step 1: Write the proportion equation
   9,065.10 : 13,596.78 = 3,221.40 : x
2. Step 2: Convert to fraction form
   9,065.10/13,596.78 = 3,221.40/x
3. Step 3: Cross multiply
   9,065.10x = 13,596.78 × 3,221.40
4. Step 4: Simplify right side
   9,065.10x = 43,800,667.09
5. Step 5: Solve for x
   x = 43,800,667.09/9,065.10
6. Step 6: Final answer
   x = 4,831.79