Finding the Fourth Proportional to 13,290.06, 18,340.29 and 7,321.73

Step by Step Solution

1. Step 1: Write the proportion equation
   13,290.06 : 18,340.29 = 7,321.73 : x
2. Step 2: Convert to fraction form
   13,290.06/18,340.29 = 7,321.73/x
3. Step 3: Cross multiply
   13,290.06x = 18,340.29 × 7,321.73
4. Step 4: Simplify right side
   13,290.06x = 134,282,651.50
5. Step 5: Solve for x
   x = 134,282,651.50/13,290.06
6. Step 6: Final answer
   x = 10,103.99