Finding the Fourth Proportional to 1,418.82, 2,128.32 and 494.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418.82 : 2,128.32 = 494.34 : x
2. Step 2: Convert to fraction form
   1,418.82/2,128.32 = 494.34/x
3. Step 3: Cross multiply
   1,418.82x = 2,128.32 × 494.34
4. Step 4: Simplify right side
   1,418.82x = 1,052,113.71
5. Step 5: Solve for x
   x = 1,052,113.71/1,418.82
6. Step 6: Final answer
   x = 741.54