Finding the Fourth Proportional to 13,449.72, 18,559.71 and 7,480.95

Step by Step Solution

1. Step 1: Write the proportion equation
   13,449.72 : 18,559.71 = 7,480.95 : x
2. Step 2: Convert to fraction form
   13,449.72/18,559.71 = 7,480.95/x
3. Step 3: Cross multiply
   13,449.72x = 18,559.71 × 7,480.95
4. Step 4: Simplify right side
   13,449.72x = 138,844,262.52
5. Step 5: Solve for x
   x = 138,844,262.52/13,449.72
6. Step 6: Final answer
   x = 10,323.21