Finding the Fourth Proportional to 2,036.20, 3,054.86 and 866.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,036.20 : 3,054.86 = 866.39 : x
2. Step 2: Convert to fraction form
   2,036.20/3,054.86 = 866.39/x
3. Step 3: Cross multiply
   2,036.20x = 3,054.86 × 866.39
4. Step 4: Simplify right side
   2,036.20x = 2,646,695.82
5. Step 5: Solve for x
   x = 2,646,695.82/2,036.20
6. Step 6: Final answer
   x = 1,299.82