Finding the Fourth Proportional to 2,212.74, 3,053.70 and 1,218.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,212.74 : 3,053.70 = 1,218.06 : x
2. Step 2: Convert to fraction form
   2,212.74/3,053.70 = 1,218.06/x
3. Step 3: Cross multiply
   2,212.74x = 3,053.70 × 1,218.06
4. Step 4: Simplify right side
   2,212.74x = 3,719,589.82
5. Step 5: Solve for x
   x = 3,719,589.82/2,212.74
6. Step 6: Final answer
   x = 1,680.99