Finding the Fourth Proportional to 13,113.01, 18,095.72 and 7,144.73

Step by Step Solution

1. Step 1: Write the proportion equation
   13,113.01 : 18,095.72 = 7,144.73 : x
2. Step 2: Convert to fraction form
   13,113.01/18,095.72 = 7,144.73/x
3. Step 3: Cross multiply
   13,113.01x = 18,095.72 × 7,144.73
4. Step 4: Simplify right side
   13,113.01x = 129,288,960.94
5. Step 5: Solve for x
   x = 129,288,960.94/13,113.01
6. Step 6: Final answer
   x = 9,859.60