Finding the Fourth Proportional to 28,453.67, 42,659.37 and 13,648.49

Step by Step Solution

1. Step 1: Write the proportion equation
   28,453.67 : 42,659.37 = 13,648.49 : x
2. Step 2: Convert to fraction form
   28,453.67/42,659.37 = 13,648.49/x
3. Step 3: Cross multiply
   28,453.67x = 42,659.37 × 13,648.49
4. Step 4: Simplify right side
   28,453.67x = 582,235,984.85
5. Step 5: Solve for x
   x = 582,235,984.85/28,453.67
6. Step 6: Final answer
   x = 20,462.60