Finding the Fourth Proportional to 1,054.56, 1,456.59 and 790.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,054.56 : 1,456.59 = 790.19 : x
2. Step 2: Convert to fraction form
   1,054.56/1,456.59 = 790.19/x
3. Step 3: Cross multiply
   1,054.56x = 1,456.59 × 790.19
4. Step 4: Simplify right side
   1,054.56x = 1,150,975.57
5. Step 5: Solve for x
   x = 1,150,975.57/1,054.56
6. Step 6: Final answer
   x = 1,091.42