Finding the Fourth Proportional to 9,142.56, 13,713.72 and 2,217.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,142.56 : 13,713.72 = 2,217.12 : x
2. Step 2: Convert to fraction form
   9,142.56/13,713.72 = 2,217.12/x
3. Step 3: Cross multiply
   9,142.56x = 13,713.72 × 2,217.12
4. Step 4: Simplify right side
   9,142.56x = 30,404,962.89
5. Step 5: Solve for x
   x = 30,404,962.89/9,142.56
6. Step 6: Final answer
   x = 3,325.65