Finding the Fourth Proportional to 3,590.89, 5,386.40 and 993.83

Step by Step Solution

1. Step 1: Write the proportion equation
   3,590.89 : 5,386.40 = 993.83 : x
2. Step 2: Convert to fraction form
   3,590.89/5,386.40 = 993.83/x
3. Step 3: Cross multiply
   3,590.89x = 5,386.40 × 993.83
4. Step 4: Simplify right side
   3,590.89x = 5,353,175.61
5. Step 5: Solve for x
   x = 5,353,175.61/3,590.89
6. Step 6: Final answer
   x = 1,490.76