Finding the Fourth Proportional to 6,665.58, 9,196.47 and 3,870.54

Step by Step Solution

1. Step 1: Write the proportion equation
   6,665.58 : 9,196.47 = 3,870.54 : x
2. Step 2: Convert to fraction form
   6,665.58/9,196.47 = 3,870.54/x
3. Step 3: Cross multiply
   6,665.58x = 9,196.47 × 3,870.54
4. Step 4: Simplify right side
   6,665.58x = 35,595,304.99
5. Step 5: Solve for x
   x = 35,595,304.99/6,665.58
6. Step 6: Final answer
   x = 5,340.17