Finding the Fourth Proportional to 1,191.29, 1,786.28 and 845.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.29 : 1,786.28 = 845.30 : x
2. Step 2: Convert to fraction form
   1,191.29/1,786.28 = 845.30/x
3. Step 3: Cross multiply
   1,191.29x = 1,786.28 × 845.30
4. Step 4: Simplify right side
   1,191.29x = 1,509,942.72
5. Step 5: Solve for x
   x = 1,509,942.72/1,191.29
6. Step 6: Final answer
   x = 1,267.49