Finding the Fourth Proportional to 12,480.48, 17,222.81 and 6,815.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,480.48 : 17,222.81 = 6,815.34 : x
2. Step 2: Convert to fraction form
   12,480.48/17,222.81 = 6,815.34/x
3. Step 3: Cross multiply
   12,480.48x = 17,222.81 × 6,815.34
4. Step 4: Simplify right side
   12,480.48x = 117,379,271.83
5. Step 5: Solve for x
   x = 117,379,271.83/12,480.48
6. Step 6: Final answer
   x = 9,405.03