Finding the Fourth Proportional to 9,448.80, 13,003.36 and 9,204.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,448.80 : 13,003.36 = 9,204.72 : x
2. Step 2: Convert to fraction form
   9,448.80/13,003.36 = 9,204.72/x
3. Step 3: Cross multiply
   9,448.80x = 13,003.36 × 9,204.72
4. Step 4: Simplify right side
   9,448.80x = 119,692,287.86
5. Step 5: Solve for x
   x = 119,692,287.86/9,448.80
6. Step 6: Final answer
   x = 12,667.46