Finding the Fourth Proportional to 1,418.83, 2,128.55 and 494.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418.83 : 2,128.55 = 494.42 : x
2. Step 2: Convert to fraction form
   1,418.83/2,128.55 = 494.42/x
3. Step 3: Cross multiply
   1,418.83x = 2,128.55 × 494.42
4. Step 4: Simplify right side
   1,418.83x = 1,052,384.58
5. Step 5: Solve for x
   x = 1,052,384.58/1,418.83
6. Step 6: Final answer
   x = 741.73