Finding the Fourth Proportional to 28,238.82, 42,360.24 and 8,518.88

Step by Step Solution

1. Step 1: Write the proportion equation
   28,238.82 : 42,360.24 = 8,518.88 : x
2. Step 2: Convert to fraction form
   28,238.82/42,360.24 = 8,518.88/x
3. Step 3: Cross multiply
   28,238.82x = 42,360.24 × 8,518.88
4. Step 4: Simplify right side
   28,238.82x = 360,861,801.33
5. Step 5: Solve for x
   x = 360,861,801.33/28,238.82
6. Step 6: Final answer
   x = 12,778.93