Finding the Fourth Proportional to 3,558.87, 5,300.78 and 3,398.96

Step by Step Solution

1. Step 1: Write the proportion equation
   3,558.87 : 5,300.78 = 3,398.96 : x
2. Step 2: Convert to fraction form
   3,558.87/5,300.78 = 3,398.96/x
3. Step 3: Cross multiply
   3,558.87x = 5,300.78 × 3,398.96
4. Step 4: Simplify right side
   3,558.87x = 18,017,135.45
5. Step 5: Solve for x
   x = 18,017,135.45/3,558.87
6. Step 6: Final answer
   x = 5,062.60