Finding the Fourth Proportional to 1,052.25, 1,454.72 and 789.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,052.25 : 1,454.72 = 789.81 : x
2. Step 2: Convert to fraction form
   1,052.25/1,454.72 = 789.81/x
3. Step 3: Cross multiply
   1,052.25x = 1,454.72 × 789.81
4. Step 4: Simplify right side
   1,052.25x = 1,148,952.40
5. Step 5: Solve for x
   x = 1,148,952.40/1,052.25
6. Step 6: Final answer
   x = 1,091.90