Finding the Fourth Proportional to 9,336.72, 12,884.76 and 5,145.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,336.72 : 12,884.76 = 5,145.12 : x
2. Step 2: Convert to fraction form
   9,336.72/12,884.76 = 5,145.12/x
3. Step 3: Cross multiply
   9,336.72x = 12,884.76 × 5,145.12
4. Step 4: Simplify right side
   9,336.72x = 66,293,636.37
5. Step 5: Solve for x
   x = 66,293,636.37/9,336.72
6. Step 6: Final answer
   x = 7,100.31