Finding the Fourth Proportional to 1,383.86, 1,905.81 and 1,274.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383.86 : 1,905.81 = 1,274.42 : x
2. Step 2: Convert to fraction form
   1,383.86/1,905.81 = 1,274.42/x
3. Step 3: Cross multiply
   1,383.86x = 1,905.81 × 1,274.42
4. Step 4: Simplify right side
   1,383.86x = 2,428,802.38
5. Step 5: Solve for x
   x = 2,428,802.38/1,383.86
6. Step 6: Final answer
   x = 1,755.09