Finding the Fourth Proportional to 1,866.89, 2,794.59 and 1,427.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,866.89 : 2,794.59 = 1,427.06 : x
2. Step 2: Convert to fraction form
   1,866.89/2,794.59 = 1,427.06/x
3. Step 3: Cross multiply
   1,866.89x = 2,794.59 × 1,427.06
4. Step 4: Simplify right side
   1,866.89x = 3,988,033.63
5. Step 5: Solve for x
   x = 3,988,033.63/1,866.89
6. Step 6: Final answer
   x = 2,136.20