Finding the Fourth Proportional to 3,838.05, 5,749.55 and 1,990.39

Step by Step Solution

1. Step 1: Write the proportion equation
   3,838.05 : 5,749.55 = 1,990.39 : x
2. Step 2: Convert to fraction form
   3,838.05/5,749.55 = 1,990.39/x
3. Step 3: Cross multiply
   3,838.05x = 5,749.55 × 1,990.39
4. Step 4: Simplify right side
   3,838.05x = 11,443,822.50
5. Step 5: Solve for x
   x = 11,443,822.50/3,838.05
6. Step 6: Final answer
   x = 2,981.68