Finding the Fourth Proportional to 2,158.82, 2,979.16 and 1,274.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.82 : 2,979.16 = 1,274.63 : x
2. Step 2: Convert to fraction form
   2,158.82/2,979.16 = 1,274.63/x
3. Step 3: Cross multiply
   2,158.82x = 2,979.16 × 1,274.63
4. Step 4: Simplify right side
   2,158.82x = 3,797,326.71
5. Step 5: Solve for x
   x = 3,797,326.71/2,158.82
6. Step 6: Final answer
   x = 1,758.99