Finding the Fourth Proportional to 3,558.45, 4,910.78 and 2,066.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,558.45 : 4,910.78 = 2,066.28 : x
2. Step 2: Convert to fraction form
   3,558.45/4,910.78 = 2,066.28/x
3. Step 3: Cross multiply
   3,558.45x = 4,910.78 × 2,066.28
4. Step 4: Simplify right side
   3,558.45x = 10,147,046.50
5. Step 5: Solve for x
   x = 10,147,046.50/3,558.45
6. Step 6: Final answer
   x = 2,851.54