Finding the Fourth Proportional to 1,349.78, 1,863.72 and 1,054.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,349.78 : 1,863.72 = 1,054.53 : x
2. Step 2: Convert to fraction form
   1,349.78/1,863.72 = 1,054.53/x
3. Step 3: Cross multiply
   1,349.78x = 1,863.72 × 1,054.53
4. Step 4: Simplify right side
   1,349.78x = 1,965,348.65
5. Step 5: Solve for x
   x = 1,965,348.65/1,349.78
6. Step 6: Final answer
   x = 1,456.06