Finding the Fourth Proportional to 1,407.77, 1,942.25 and 911.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.77 : 1,942.25 = 911.04 : x
2. Step 2: Convert to fraction form
   1,407.77/1,942.25 = 911.04/x
3. Step 3: Cross multiply
   1,407.77x = 1,942.25 × 911.04
4. Step 4: Simplify right side
   1,407.77x = 1,769,469.72
5. Step 5: Solve for x
   x = 1,769,469.72/1,407.77
6. Step 6: Final answer
   x = 1,256.93