Finding the Fourth Proportional to 9,604.37, 13,200.38 and 8,478.47

Step by Step Solution

1. Step 1: Write the proportion equation
   9,604.37 : 13,200.38 = 8,478.47 : x
2. Step 2: Convert to fraction form
   9,604.37/13,200.38 = 8,478.47/x
3. Step 3: Cross multiply
   9,604.37x = 13,200.38 × 8,478.47
4. Step 4: Simplify right side
   9,604.37x = 111,918,917.42
5. Step 5: Solve for x
   x = 111,918,917.42/9,604.37
6. Step 6: Final answer
   x = 11,652.92