Finding the Fourth Proportional to 3,453.82, 4,767.17 and 2,128.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,453.82 : 4,767.17 = 2,128.61 : x
2. Step 2: Convert to fraction form
   3,453.82/4,767.17 = 2,128.61/x
3. Step 3: Cross multiply
   3,453.82x = 4,767.17 × 2,128.61
4. Step 4: Simplify right side
   3,453.82x = 10,147,447.01
5. Step 5: Solve for x
   x = 10,147,447.01/3,453.82
6. Step 6: Final answer
   x = 2,938.04