Finding the Fourth Proportional to 1,043.73, 1,439.37 and 903.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,043.73 : 1,439.37 = 903.78 : x
2. Step 2: Convert to fraction form
   1,043.73/1,439.37 = 903.78/x
3. Step 3: Cross multiply
   1,043.73x = 1,439.37 × 903.78
4. Step 4: Simplify right side
   1,043.73x = 1,300,873.82
5. Step 5: Solve for x
   x = 1,300,873.82/1,043.73
6. Step 6: Final answer
   x = 1,246.37