Finding the Fourth Proportional to 19,019.98, 28,519.68 and 13,484.16

Step by Step Solution

1. Step 1: Write the proportion equation
   19,019.98 : 28,519.68 = 13,484.16 : x
2. Step 2: Convert to fraction form
   19,019.98/28,519.68 = 13,484.16/x
3. Step 3: Cross multiply
   19,019.98x = 28,519.68 × 13,484.16
4. Step 4: Simplify right side
   19,019.98x = 384,563,928.27
5. Step 5: Solve for x
   x = 384,563,928.27/19,019.98
6. Step 6: Final answer
   x = 20,218.94