Finding the Fourth Proportional to 12,017.89, 18,028.88 and 5,356.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,017.89 : 18,028.88 = 5,356.80 : x
2. Step 2: Convert to fraction form
   12,017.89/18,028.88 = 5,356.80/x
3. Step 3: Cross multiply
   12,017.89x = 18,028.88 × 5,356.80
4. Step 4: Simplify right side
   12,017.89x = 96,577,097.69
5. Step 5: Solve for x
   x = 96,577,097.69/12,017.89
6. Step 6: Final answer
   x = 8,036.11