Finding the Fourth Proportional to 2,620.74, 3,928.35 and 1,159.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.74 : 3,928.35 = 1,159.71 : x
2. Step 2: Convert to fraction form
   2,620.74/3,928.35 = 1,159.71/x
3. Step 3: Cross multiply
   2,620.74x = 3,928.35 × 1,159.71
4. Step 4: Simplify right side
   2,620.74x = 4,555,746.78
5. Step 5: Solve for x
   x = 4,555,746.78/2,620.74
6. Step 6: Final answer
   x = 1,738.34