Finding the Fourth Proportional to 12,485.20, 17,177.88 and 9,483.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,485.20 : 17,177.88 = 9,483.52 : x
2. Step 2: Convert to fraction form
   12,485.20/17,177.88 = 9,483.52/x
3. Step 3: Cross multiply
   12,485.20x = 17,177.88 × 9,483.52
4. Step 4: Simplify right side
   12,485.20x = 162,906,768.54
5. Step 5: Solve for x
   x = 162,906,768.54/12,485.20
6. Step 6: Final answer
   x = 13,047.99