Finding the Fourth Proportional to 19,003.98, 28,480.86 and 13,756.53

Step by Step Solution

1. Step 1: Write the proportion equation
   19,003.98 : 28,480.86 = 13,756.53 : x
2. Step 2: Convert to fraction form
   19,003.98/28,480.86 = 13,756.53/x
3. Step 3: Cross multiply
   19,003.98x = 28,480.86 × 13,756.53
4. Step 4: Simplify right side
   19,003.98x = 391,797,805.02
5. Step 5: Solve for x
   x = 391,797,805.02/19,003.98
6. Step 6: Final answer
   x = 20,616.62