Finding the Fourth Proportional to 3,783.90, 5,218.71 and 3,257.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,783.90 : 5,218.71 = 3,257.82 : x
2. Step 2: Convert to fraction form
   3,783.90/5,218.71 = 3,257.82/x
3. Step 3: Cross multiply
   3,783.90x = 5,218.71 × 3,257.82
4. Step 4: Simplify right side
   3,783.90x = 17,001,617.81
5. Step 5: Solve for x
   x = 17,001,617.81/3,783.90
6. Step 6: Final answer
   x = 4,493.15