Finding the Fourth Proportional to 1,418.34, 1,957.59 and 920.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418.34 : 1,957.59 = 920.28 : x
2. Step 2: Convert to fraction form
   1,418.34/1,957.59 = 920.28/x
3. Step 3: Cross multiply
   1,418.34x = 1,957.59 × 920.28
4. Step 4: Simplify right side
   1,418.34x = 1,801,530.93
5. Step 5: Solve for x
   x = 1,801,530.93/1,418.34
6. Step 6: Final answer
   x = 1,270.17