Finding the Fourth Proportional to 1,054.83, 1,456.20 and 818.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,054.83 : 1,456.20 = 818.25 : x
2. Step 2: Convert to fraction form
   1,054.83/1,456.20 = 818.25/x
3. Step 3: Cross multiply
   1,054.83x = 1,456.20 × 818.25
4. Step 4: Simplify right side
   1,054.83x = 1,191,535.65
5. Step 5: Solve for x
   x = 1,191,535.65/1,054.83
6. Step 6: Final answer
   x = 1,129.60