Finding the Fourth Proportional to 1,351.89, 1,866.66 and 1,091.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,351.89 : 1,866.66 = 1,091.07 : x
2. Step 2: Convert to fraction form
   1,351.89/1,866.66 = 1,091.07/x
3. Step 3: Cross multiply
   1,351.89x = 1,866.66 × 1,091.07
4. Step 4: Simplify right side
   1,351.89x = 2,036,656.73
5. Step 5: Solve for x
   x = 2,036,656.73/1,351.89
6. Step 6: Final answer
   x = 1,506.53