Finding the Fourth Proportional to 12,321.34, 17,005.21 and 7,016.65

Step by Step Solution

1. Step 1: Write the proportion equation
   12,321.34 : 17,005.21 = 7,016.65 : x
2. Step 2: Convert to fraction form
   12,321.34/17,005.21 = 7,016.65/x
3. Step 3: Cross multiply
   12,321.34x = 17,005.21 × 7,016.65
4. Step 4: Simplify right side
   12,321.34x = 119,319,546.69
5. Step 5: Solve for x
   x = 119,319,546.69/12,321.34
6. Step 6: Final answer
   x = 9,683.98