Finding the Fourth Proportional to 1,403.16, 1,936.38 and 905.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,403.16 : 1,936.38 = 905.82 : x
2. Step 2: Convert to fraction form
   1,403.16/1,936.38 = 905.82/x
3. Step 3: Cross multiply
   1,403.16x = 1,936.38 × 905.82
4. Step 4: Simplify right side
   1,403.16x = 1,754,011.73
5. Step 5: Solve for x
   x = 1,754,011.73/1,403.16
6. Step 6: Final answer
   x = 1,250.04