Finding the Fourth Proportional to 2,212.91, 3,053.73 and 1,218.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,212.91 : 3,053.73 = 1,218.17 : x
2. Step 2: Convert to fraction form
   2,212.91/3,053.73 = 1,218.17/x
3. Step 3: Cross multiply
   2,212.91x = 3,053.73 × 1,218.17
4. Step 4: Simplify right side
   2,212.91x = 3,719,962.27
5. Step 5: Solve for x
   x = 3,719,962.27/2,212.91
6. Step 6: Final answer
   x = 1,681.03