Finding the Fourth Proportional to 1,402.76, 1,935.42 and 905.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.76 : 1,935.42 = 905.42 : x
2. Step 2: Convert to fraction form
   1,402.76/1,935.42 = 905.42/x
3. Step 3: Cross multiply
   1,402.76x = 1,935.42 × 905.42
4. Step 4: Simplify right side
   1,402.76x = 1,752,367.98
5. Step 5: Solve for x
   x = 1,752,367.98/1,402.76
6. Step 6: Final answer
   x = 1,249.23