Finding the Fourth Proportional to 3,789.99, 5,230.27 and 2,111.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,789.99 : 5,230.27 = 2,111.57 : x
2. Step 2: Convert to fraction form
   3,789.99/5,230.27 = 2,111.57/x
3. Step 3: Cross multiply
   3,789.99x = 5,230.27 × 2,111.57
4. Step 4: Simplify right side
   3,789.99x = 11,044,077.33
5. Step 5: Solve for x
   x = 11,044,077.33/3,789.99
6. Step 6: Final answer
   x = 2,914.01