Finding the Fourth Proportional to 3,454.82, 4,768.55 and 2,129.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,454.82 : 4,768.55 = 2,129.61 : x
2. Step 2: Convert to fraction form
   3,454.82/4,768.55 = 2,129.61/x
3. Step 3: Cross multiply
   3,454.82x = 4,768.55 × 2,129.61
4. Step 4: Simplify right side
   3,454.82x = 10,155,151.77
5. Step 5: Solve for x
   x = 10,155,151.77/3,454.82
6. Step 6: Final answer
   x = 2,939.42