Finding the Fourth Proportional to 3,458.89, 5,189.24 and 993.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,458.89 : 5,189.24 = 993.91 : x
2. Step 2: Convert to fraction form
   3,458.89/5,189.24 = 993.91/x
3. Step 3: Cross multiply
   3,458.89x = 5,189.24 × 993.91
4. Step 4: Simplify right side
   3,458.89x = 5,157,632.56
5. Step 5: Solve for x
   x = 5,157,632.56/3,458.89
6. Step 6: Final answer
   x = 1,491.12