Finding the Fourth Proportional to 2,621.43, 3,929.72 and 1,159.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.43 : 3,929.72 = 1,159.79 : x
2. Step 2: Convert to fraction form
   2,621.43/3,929.72 = 1,159.79/x
3. Step 3: Cross multiply
   2,621.43x = 3,929.72 × 1,159.79
4. Step 4: Simplify right side
   2,621.43x = 4,557,624.51
5. Step 5: Solve for x
   x = 4,557,624.51/2,621.43
6. Step 6: Final answer
   x = 1,738.60