Finding the Fourth Proportional to 13,448.89, 18,559.50 and 7,480.63

Step by Step Solution

1. Step 1: Write the proportion equation
   13,448.89 : 18,559.50 = 7,480.63 : x
2. Step 2: Convert to fraction form
   13,448.89/18,559.50 = 7,480.63/x
3. Step 3: Cross multiply
   13,448.89x = 18,559.50 × 7,480.63
4. Step 4: Simplify right side
   13,448.89x = 138,836,659.69
5. Step 5: Solve for x
   x = 138,836,659.69/13,448.89
6. Step 6: Final answer
   x = 10,323.28