Finding the Fourth Proportional to 1,805.42, 2,494.17 and 1,218.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,805.42 : 2,494.17 = 1,218.57 : x
2. Step 2: Convert to fraction form
   1,805.42/2,494.17 = 1,218.57/x
3. Step 3: Cross multiply
   1,805.42x = 2,494.17 × 1,218.57
4. Step 4: Simplify right side
   1,805.42x = 3,039,320.74
5. Step 5: Solve for x
   x = 3,039,320.74/1,805.42
6. Step 6: Final answer
   x = 1,683.45