Finding the Fourth Proportional to 12,386.64, 17,096.20 and 7,421.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,386.64 : 17,096.20 = 7,421.52 : x
2. Step 2: Convert to fraction form
   12,386.64/17,096.20 = 7,421.52/x
3. Step 3: Cross multiply
   12,386.64x = 17,096.20 × 7,421.52
4. Step 4: Simplify right side
   12,386.64x = 126,879,790.22
5. Step 5: Solve for x
   x = 126,879,790.22/12,386.64
6. Step 6: Final answer
   x = 10,243.28