Finding the Fourth Proportional to 1,383.94, 1,910.15 and 942.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383.94 : 1,910.15 = 942.90 : x
2. Step 2: Convert to fraction form
   1,383.94/1,910.15 = 942.90/x
3. Step 3: Cross multiply
   1,383.94x = 1,910.15 × 942.90
4. Step 4: Simplify right side
   1,383.94x = 1,801,080.44
5. Step 5: Solve for x
   x = 1,801,080.44/1,383.94
6. Step 6: Final answer
   x = 1,301.42