Finding the Fourth Proportional to 900.33, 1,355.78 and 786.15

Step by Step Solution

1. Step 1: Write the proportion equation
   900.33 : 1,355.78 = 786.15 : x
2. Step 2: Convert to fraction form
   900.33/1,355.78 = 786.15/x
3. Step 3: Cross multiply
   900.33x = 1,355.78 × 786.15
4. Step 4: Simplify right side
   900.33x = 1,065,842.52
5. Step 5: Solve for x
   x = 1,065,842.52/900.33
6. Step 6: Final answer
   x = 1,183.84