Finding the Fourth Proportional to 6,636.54, 9,158.16 and 3,911.05

Step by Step Solution

1. Step 1: Write the proportion equation
   6,636.54 : 9,158.16 = 3,911.05 : x
2. Step 2: Convert to fraction form
   6,636.54/9,158.16 = 3,911.05/x
3. Step 3: Cross multiply
   6,636.54x = 9,158.16 × 3,911.05
4. Step 4: Simplify right side
   6,636.54x = 35,817,956.32
5. Step 5: Solve for x
   x = 35,817,956.32/6,636.54
6. Step 6: Final answer
   x = 5,397.08