Finding the Fourth Proportional to 10,448.73, 15,674.47 and 5,518.57

Step by Step Solution

1. Step 1: Write the proportion equation
   10,448.73 : 15,674.47 = 5,518.57 : x
2. Step 2: Convert to fraction form
   10,448.73/15,674.47 = 5,518.57/x
3. Step 3: Cross multiply
   10,448.73x = 15,674.47 × 5,518.57
4. Step 4: Simplify right side
   10,448.73x = 86,500,634.52
5. Step 5: Solve for x
   x = 86,500,634.52/10,448.73
6. Step 6: Final answer
   x = 8,278.58