Finding the Fourth Proportional to 12,446.69, 17,168.58 and 7,407.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,446.69 : 17,168.58 = 7,407.15 : x
2. Step 2: Convert to fraction form
   12,446.69/17,168.58 = 7,407.15/x
3. Step 3: Cross multiply
   12,446.69x = 17,168.58 × 7,407.15
4. Step 4: Simplify right side
   12,446.69x = 127,170,203.80
5. Step 5: Solve for x
   x = 127,170,203.80/12,446.69
6. Step 6: Final answer
   x = 10,217.19