Finding the Fourth Proportional to 12,946.62, 17,865.32 and 7,280.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,946.62 : 17,865.32 = 7,280.31 : x
2. Step 2: Convert to fraction form
   12,946.62/17,865.32 = 7,280.31/x
3. Step 3: Cross multiply
   12,946.62x = 17,865.32 × 7,280.31
4. Step 4: Simplify right side
   12,946.62x = 130,065,067.85
5. Step 5: Solve for x
   x = 130,065,067.85/12,946.62
6. Step 6: Final answer
   x = 10,046.26