Finding the Fourth Proportional to 12,874.72, 17,765.76 and 7,285.36

Step by Step Solution

1. Step 1: Write the proportion equation
   12,874.72 : 17,765.76 = 7,285.36 : x
2. Step 2: Convert to fraction form
   12,874.72/17,765.76 = 7,285.36/x
3. Step 3: Cross multiply
   12,874.72x = 17,765.76 × 7,285.36
4. Step 4: Simplify right side
   12,874.72x = 129,429,957.27
5. Step 5: Solve for x
   x = 129,429,957.27/12,874.72
6. Step 6: Final answer
   x = 10,053.03