Finding the Fourth Proportional to 3,859.90, 5,789.83 and 938.17

Step by Step Solution

1. Step 1: Write the proportion equation
   3,859.90 : 5,789.83 = 938.17 : x
2. Step 2: Convert to fraction form
   3,859.90/5,789.83 = 938.17/x
3. Step 3: Cross multiply
   3,859.90x = 5,789.83 × 938.17
4. Step 4: Simplify right side
   3,859.90x = 5,431,844.81
5. Step 5: Solve for x
   x = 5,431,844.81/3,859.90
6. Step 6: Final answer
   x = 1,407.25