Finding the Fourth Proportional to 1,418.09, 1,956.56 and 920.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418.09 : 1,956.56 = 920.30 : x
2. Step 2: Convert to fraction form
   1,418.09/1,956.56 = 920.30/x
3. Step 3: Cross multiply
   1,418.09x = 1,956.56 × 920.30
4. Step 4: Simplify right side
   1,418.09x = 1,800,607.78
5. Step 5: Solve for x
   x = 1,800,607.78/1,418.09
6. Step 6: Final answer
   x = 1,269.75