Finding the Fourth Proportional to 19,172.34, 28,760.49 and 5,321.34

Step by Step Solution

1. Step 1: Write the proportion equation
   19,172.34 : 28,760.49 = 5,321.34 : x
2. Step 2: Convert to fraction form
   19,172.34/28,760.49 = 5,321.34/x
3. Step 3: Cross multiply
   19,172.34x = 28,760.49 × 5,321.34
4. Step 4: Simplify right side
   19,172.34x = 153,044,345.86
5. Step 5: Solve for x
   x = 153,044,345.86/19,172.34
6. Step 6: Final answer
   x = 7,982.56