Finding the Fourth Proportional to 2,212.77, 3,053.63 and 1,218.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,212.77 : 3,053.63 = 1,218.04 : x
2. Step 2: Convert to fraction form
   2,212.77/3,053.63 = 1,218.04/x
3. Step 3: Cross multiply
   2,212.77x = 3,053.63 × 1,218.04
4. Step 4: Simplify right side
   2,212.77x = 3,719,443.12
5. Step 5: Solve for x
   x = 3,719,443.12/2,212.77
6. Step 6: Final answer
   x = 1,680.90