Finding the Fourth Proportional to 1,238.06, 1,855.33 and 1,091.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,238.06 : 1,855.33 = 1,091.49 : x
2. Step 2: Convert to fraction form
   1,238.06/1,855.33 = 1,091.49/x
3. Step 3: Cross multiply
   1,238.06x = 1,855.33 × 1,091.49
4. Step 4: Simplify right side
   1,238.06x = 2,025,071.41
5. Step 5: Solve for x
   x = 2,025,071.41/1,238.06
6. Step 6: Final answer
   x = 1,635.69