Finding the Fourth Proportional to 4,789.41, 7,181.55 and 2,118.57

Step by Step Solution

1. Step 1: Write the proportion equation
   4,789.41 : 7,181.55 = 2,118.57 : x
2. Step 2: Convert to fraction form
   4,789.41/7,181.55 = 2,118.57/x
3. Step 3: Cross multiply
   4,789.41x = 7,181.55 × 2,118.57
4. Step 4: Simplify right side
   4,789.41x = 15,214,616.38
5. Step 5: Solve for x
   x = 15,214,616.38/4,789.41
6. Step 6: Final answer
   x = 3,176.72