Finding the Fourth Proportional to 12,429.20, 17,145.02 and 7,951.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,429.20 : 17,145.02 = 7,951.30 : x
2. Step 2: Convert to fraction form
   12,429.20/17,145.02 = 7,951.30/x
3. Step 3: Cross multiply
   12,429.20x = 17,145.02 × 7,951.30
4. Step 4: Simplify right side
   12,429.20x = 136,325,197.53
5. Step 5: Solve for x
   x = 136,325,197.53/12,429.20
6. Step 6: Final answer
   x = 10,968.14