Finding the Fourth Proportional to 2,214.72, 3,322.72 and 828.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,214.72 : 3,322.72 = 828.48 : x
2. Step 2: Convert to fraction form
   2,214.72/3,322.72 = 828.48/x
3. Step 3: Cross multiply
   2,214.72x = 3,322.72 × 828.48
4. Step 4: Simplify right side
   2,214.72x = 2,752,807.07
5. Step 5: Solve for x
   x = 2,752,807.07/2,214.72
6. Step 6: Final answer
   x = 1,242.96