Finding the Fourth Proportional to 2,212.82, 3,053.76 and 1,218.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,212.82 : 3,053.76 = 1,218.16 : x
2. Step 2: Convert to fraction form
   2,212.82/3,053.76 = 1,218.16/x
3. Step 3: Cross multiply
   2,212.82x = 3,053.76 × 1,218.16
4. Step 4: Simplify right side
   2,212.82x = 3,719,968.28
5. Step 5: Solve for x
   x = 3,719,968.28/2,212.82
6. Step 6: Final answer
   x = 1,681.10