Finding the Fourth Proportional to 1,419.40, 1,959.78 and 922.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.40 : 1,959.78 = 922.60 : x
2. Step 2: Convert to fraction form
   1,419.40/1,959.78 = 922.60/x
3. Step 3: Cross multiply
   1,419.40x = 1,959.78 × 922.60
4. Step 4: Simplify right side
   1,419.40x = 1,808,093.03
5. Step 5: Solve for x
   x = 1,808,093.03/1,419.40
6. Step 6: Final answer
   x = 1,273.84