Finding the Fourth Proportional to 1,866.62, 2,799.06 and 1,086.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,866.62 : 2,799.06 = 1,086.83 : x
2. Step 2: Convert to fraction form
   1,866.62/2,799.06 = 1,086.83/x
3. Step 3: Cross multiply
   1,866.62x = 2,799.06 × 1,086.83
4. Step 4: Simplify right side
   1,866.62x = 3,042,094.81
5. Step 5: Solve for x
   x = 3,042,094.81/1,866.62
6. Step 6: Final answer
   x = 1,629.73