Finding the Fourth Proportional to 9,212.56, 13,818.72 and 2,287.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,212.56 : 13,818.72 = 2,287.12 : x
2. Step 2: Convert to fraction form
   9,212.56/13,818.72 = 2,287.12/x
3. Step 3: Cross multiply
   9,212.56x = 13,818.72 × 2,287.12
4. Step 4: Simplify right side
   9,212.56x = 31,605,070.89
5. Step 5: Solve for x
   x = 31,605,070.89/9,212.56
6. Step 6: Final answer
   x = 3,430.65