Finding the Fourth Proportional to 3,788.47, 5,227.71 and 2,109.97

Step by Step Solution

1. Step 1: Write the proportion equation
   3,788.47 : 5,227.71 = 2,109.97 : x
2. Step 2: Convert to fraction form
   3,788.47/5,227.71 = 2,109.97/x
3. Step 3: Cross multiply
   3,788.47x = 5,227.71 × 2,109.97
4. Step 4: Simplify right side
   3,788.47x = 11,030,311.27
5. Step 5: Solve for x
   x = 11,030,311.27/3,788.47
6. Step 6: Final answer
   x = 2,911.55