Finding the Fourth Proportional to 12,860.72, 17,751.56 and 7,484.44

Step by Step Solution

1. Step 1: Write the proportion equation
   12,860.72 : 17,751.56 = 7,484.44 : x
2. Step 2: Convert to fraction form
   12,860.72/17,751.56 = 7,484.44/x
3. Step 3: Cross multiply
   12,860.72x = 17,751.56 × 7,484.44
4. Step 4: Simplify right side
   12,860.72x = 132,860,485.73
5. Step 5: Solve for x
   x = 132,860,485.73/12,860.72
6. Step 6: Final answer
   x = 10,330.72