Finding the Fourth Proportional to 9,456.48, 14,191.20 and 9,054.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,456.48 : 14,191.20 = 9,054.72 : x
2. Step 2: Convert to fraction form
   9,456.48/14,191.20 = 9,054.72/x
3. Step 3: Cross multiply
   9,456.48x = 14,191.20 × 9,054.72
4. Step 4: Simplify right side
   9,456.48x = 128,497,342.46
5. Step 5: Solve for x
   x = 128,497,342.46/9,456.48
6. Step 6: Final answer
   x = 13,588.28