Finding the Fourth Proportional to 2,159.65, 2,979.81 and 1,275.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,159.65 : 2,979.81 = 1,275.59 : x
2. Step 2: Convert to fraction form
   2,159.65/2,979.81 = 1,275.59/x
3. Step 3: Cross multiply
   2,159.65x = 2,979.81 × 1,275.59
4. Step 4: Simplify right side
   2,159.65x = 3,801,000.94
5. Step 5: Solve for x
   x = 3,801,000.94/2,159.65
6. Step 6: Final answer
   x = 1,760.01