Finding the Fourth Proportional to 1,404.28, 1,936.74 and 1,054.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.28 : 1,936.74 = 1,054.36 : x
2. Step 2: Convert to fraction form
   1,404.28/1,936.74 = 1,054.36/x
3. Step 3: Cross multiply
   1,404.28x = 1,936.74 × 1,054.36
4. Step 4: Simplify right side
   1,404.28x = 2,042,021.19
5. Step 5: Solve for x
   x = 2,042,021.19/1,404.28
6. Step 6: Final answer
   x = 1,454.14