Finding the Fourth Proportional to 1,408.96, 1,943.09 and 911.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,408.96 : 1,943.09 = 911.08 : x
2. Step 2: Convert to fraction form
   1,408.96/1,943.09 = 911.08/x
3. Step 3: Cross multiply
   1,408.96x = 1,943.09 × 911.08
4. Step 4: Simplify right side
   1,408.96x = 1,770,300.72
5. Step 5: Solve for x
   x = 1,770,300.72/1,408.96
6. Step 6: Final answer
   x = 1,256.46