Finding the Fourth Proportional to 2,159.24, 2,979.69 and 1,275.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,159.24 : 2,979.69 = 1,275.12 : x
2. Step 2: Convert to fraction form
   2,159.24/2,979.69 = 1,275.12/x
3. Step 3: Cross multiply
   2,159.24x = 2,979.69 × 1,275.12
4. Step 4: Simplify right side
   2,159.24x = 3,799,462.31
5. Step 5: Solve for x
   x = 3,799,462.31/2,159.24
6. Step 6: Final answer
   x = 1,759.63