Finding the Fourth Proportional to 6,678.98, 10,015.42 and 3,558.18

Step by Step Solution

1. Step 1: Write the proportion equation
   6,678.98 : 10,015.42 = 3,558.18 : x
2. Step 2: Convert to fraction form
   6,678.98/10,015.42 = 3,558.18/x
3. Step 3: Cross multiply
   6,678.98x = 10,015.42 × 3,558.18
4. Step 4: Simplify right side
   6,678.98x = 35,636,667.14
5. Step 5: Solve for x
   x = 35,636,667.14/6,678.98
6. Step 6: Final answer
   x = 5,335.65