Finding the Fourth Proportional to 3,789.89, 5,230.04 and 2,111.45

Step by Step Solution

1. Step 1: Write the proportion equation
   3,789.89 : 5,230.04 = 2,111.45 : x
2. Step 2: Convert to fraction form
   3,789.89/5,230.04 = 2,111.45/x
3. Step 3: Cross multiply
   3,789.89x = 5,230.04 × 2,111.45
4. Step 4: Simplify right side
   3,789.89x = 11,042,941.81
5. Step 5: Solve for x
   x = 11,042,941.81/3,789.89
6. Step 6: Final answer
   x = 2,913.79