Finding the Fourth Proportional to 12,321.18, 17,002.59 and 7,015.98

Step by Step Solution

1. Step 1: Write the proportion equation
   12,321.18 : 17,002.59 = 7,015.98 : x
2. Step 2: Convert to fraction form
   12,321.18/17,002.59 = 7,015.98/x
3. Step 3: Cross multiply
   12,321.18x = 17,002.59 × 7,015.98
4. Step 4: Simplify right side
   12,321.18x = 119,289,831.39
5. Step 5: Solve for x
   x = 119,289,831.39/12,321.18
6. Step 6: Final answer
   x = 9,681.69