Finding the Fourth Proportional to 1,051.77, 1,451.52 and 789.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,051.77 : 1,451.52 = 789.33 : x
2. Step 2: Convert to fraction form
   1,051.77/1,451.52 = 789.33/x
3. Step 3: Cross multiply
   1,051.77x = 1,451.52 × 789.33
4. Step 4: Simplify right side
   1,051.77x = 1,145,728.28
5. Step 5: Solve for x
   x = 1,145,728.28/1,051.77
6. Step 6: Final answer
   x = 1,089.33