Finding the Fourth Proportional to 12,644.58, 17,455.59 and 7,338.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,644.58 : 17,455.59 = 7,338.54 : x
2. Step 2: Convert to fraction form
   12,644.58/17,455.59 = 7,338.54/x
3. Step 3: Cross multiply
   12,644.58x = 17,455.59 × 7,338.54
4. Step 4: Simplify right side
   12,644.58x = 128,098,545.44
5. Step 5: Solve for x
   x = 128,098,545.44/12,644.58
6. Step 6: Final answer
   x = 10,130.71