Finding the Fourth Proportional to 2,213.42, 3,054.45 and 1,218.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,213.42 : 3,054.45 = 1,218.69 : x
2. Step 2: Convert to fraction form
   2,213.42/3,054.45 = 1,218.69/x
3. Step 3: Cross multiply
   2,213.42x = 3,054.45 × 1,218.69
4. Step 4: Simplify right side
   2,213.42x = 3,722,435.31
5. Step 5: Solve for x
   x = 3,722,435.31/2,213.42
6. Step 6: Final answer
   x = 1,681.76