Finding the Fourth Proportional to 12,395.96, 17,100.42 and 8,207.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,395.96 : 17,100.42 = 8,207.72 : x
2. Step 2: Convert to fraction form
   12,395.96/17,100.42 = 8,207.72/x
3. Step 3: Cross multiply
   12,395.96x = 17,100.42 × 8,207.72
4. Step 4: Simplify right side
   12,395.96x = 140,355,459.24
5. Step 5: Solve for x
   x = 140,355,459.24/12,395.96
6. Step 6: Final answer
   x = 11,322.68