Finding the Fourth Proportional to 1,405.24, 1,940.06 and 908.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405.24 : 1,940.06 = 908.76 : x
2. Step 2: Convert to fraction form
   1,405.24/1,940.06 = 908.76/x
3. Step 3: Cross multiply
   1,405.24x = 1,940.06 × 908.76
4. Step 4: Simplify right side
   1,405.24x = 1,763,048.93
5. Step 5: Solve for x
   x = 1,763,048.93/1,405.24
6. Step 6: Final answer
   x = 1,254.62