Finding the Fourth Proportional to 1,055.23, 1,455.72 and 789.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.23 : 1,455.72 = 789.22 : x
2. Step 2: Convert to fraction form
   1,055.23/1,455.72 = 789.22/x
3. Step 3: Cross multiply
   1,055.23x = 1,455.72 × 789.22
4. Step 4: Simplify right side
   1,055.23x = 1,148,882.54
5. Step 5: Solve for x
   x = 1,148,882.54/1,055.23
6. Step 6: Final answer
   x = 1,088.75