Finding the Fourth Proportional to 1,190.30, 1,786.55 and 605.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,190.30 : 1,786.55 = 605.71 : x
2. Step 2: Convert to fraction form
   1,190.30/1,786.55 = 605.71/x
3. Step 3: Cross multiply
   1,190.30x = 1,786.55 × 605.71
4. Step 4: Simplify right side
   1,190.30x = 1,082,131.20
5. Step 5: Solve for x
   x = 1,082,131.20/1,190.30
6. Step 6: Final answer
   x = 909.12