Finding the Fourth Proportional to 19,272.21, 28,894.29 and 13,016.71

Step by Step Solution

1. Step 1: Write the proportion equation
   19,272.21 : 28,894.29 = 13,016.71 : x
2. Step 2: Convert to fraction form
   19,272.21/28,894.29 = 13,016.71/x
3. Step 3: Cross multiply
   19,272.21x = 28,894.29 × 13,016.71
4. Step 4: Simplify right side
   19,272.21x = 376,108,593.59
5. Step 5: Solve for x
   x = 376,108,593.59/19,272.21
6. Step 6: Final answer
   x = 19,515.59