Finding the Fourth Proportional to 9,336.75, 12,884.72 and 5,145.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,336.75 : 12,884.72 = 5,145.09 : x
2. Step 2: Convert to fraction form
   9,336.75/12,884.72 = 5,145.09/x
3. Step 3: Cross multiply
   9,336.75x = 12,884.72 × 5,145.09
4. Step 4: Simplify right side
   9,336.75x = 66,293,018.30
5. Step 5: Solve for x
   x = 66,293,018.30/9,336.75
6. Step 6: Final answer
   x = 7,100.22