Finding the Fourth Proportional to 12,945.62, 17,863.94 and 7,279.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,945.62 : 17,863.94 = 7,279.31 : x
2. Step 2: Convert to fraction form
   12,945.62/17,863.94 = 7,279.31/x
3. Step 3: Cross multiply
   12,945.62x = 17,863.94 × 7,279.31
4. Step 4: Simplify right side
   12,945.62x = 130,037,085.96
5. Step 5: Solve for x
   x = 130,037,085.96/12,945.62
6. Step 6: Final answer
   x = 10,044.88