Finding the Fourth Proportional to 3,690.89, 5,512.81 and 3,338.96

Step by Step Solution

1. Step 1: Write the proportion equation
   3,690.89 : 5,512.81 = 3,338.96 : x
2. Step 2: Convert to fraction form
   3,690.89/5,512.81 = 3,338.96/x
3. Step 3: Cross multiply
   3,690.89x = 5,512.81 × 3,338.96
4. Step 4: Simplify right side
   3,690.89x = 18,407,016.17
5. Step 5: Solve for x
   x = 18,407,016.17/3,690.89
6. Step 6: Final answer
   x = 4,987.16