Finding the Fourth Proportional to 2,159.35, 2,979.89 and 1,227.85

Step by Step Solution

1. Step 1: Write the proportion equation
   2,159.35 : 2,979.89 = 1,227.85 : x
2. Step 2: Convert to fraction form
   2,159.35/2,979.89 = 1,227.85/x
3. Step 3: Cross multiply
   2,159.35x = 2,979.89 × 1,227.85
4. Step 4: Simplify right side
   2,159.35x = 3,658,857.94
5. Step 5: Solve for x
   x = 3,658,857.94/2,159.35
6. Step 6: Final answer
   x = 1,694.43