Finding the Fourth Proportional to 3,453.89, 4,766.69 and 2,128.37

Step by Step Solution

1. Step 1: Write the proportion equation
   3,453.89 : 4,766.69 = 2,128.37 : x
2. Step 2: Convert to fraction form
   3,453.89/4,766.69 = 2,128.37/x
3. Step 3: Cross multiply
   3,453.89x = 4,766.69 × 2,128.37
4. Step 4: Simplify right side
   3,453.89x = 10,145,280.00
5. Step 5: Solve for x
   x = 10,145,280.00/3,453.89
6. Step 6: Final answer
   x = 2,937.35