Finding the Fourth Proportional to 1,228.89, 1,836.15 and 1,185.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,228.89 : 1,836.15 = 1,185.83 : x
2. Step 2: Convert to fraction form
   1,228.89/1,836.15 = 1,185.83/x
3. Step 3: Cross multiply
   1,228.89x = 1,836.15 × 1,185.83
4. Step 4: Simplify right side
   1,228.89x = 2,177,366.34
5. Step 5: Solve for x
   x = 2,177,366.34/1,228.89
6. Step 6: Final answer
   x = 1,771.82