Finding the Fourth Proportional to 3,788.55, 5,227.61 and 2,109.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,788.55 : 5,227.61 = 2,109.42 : x
2. Step 2: Convert to fraction form
   3,788.55/5,227.61 = 2,109.42/x
3. Step 3: Cross multiply
   3,788.55x = 5,227.61 × 2,109.42
4. Step 4: Simplify right side
   3,788.55x = 11,027,214.54
5. Step 5: Solve for x
   x = 11,027,214.54/3,788.55
6. Step 6: Final answer
   x = 2,910.67