Finding the Fourth Proportional to 3,557.60, 4,909.33 and 2,065.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,557.60 : 4,909.33 = 2,065.42 : x
2. Step 2: Convert to fraction form
   3,557.60/4,909.33 = 2,065.42/x
3. Step 3: Cross multiply
   3,557.60x = 4,909.33 × 2,065.42
4. Step 4: Simplify right side
   3,557.60x = 10,139,828.37
5. Step 5: Solve for x
   x = 10,139,828.37/3,557.60
6. Step 6: Final answer
   x = 2,850.19