Finding the Fourth Proportional to 12,489.83, 17,238.72 and 7,951.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,489.83 : 17,238.72 = 7,951.55 : x
2. Step 2: Convert to fraction form
   12,489.83/17,238.72 = 7,951.55/x
3. Step 3: Cross multiply
   12,489.83x = 17,238.72 × 7,951.55
4. Step 4: Simplify right side
   12,489.83x = 137,074,544.02
5. Step 5: Solve for x
   x = 137,074,544.02/12,489.83
6. Step 6: Final answer
   x = 10,974.89