Finding the Fourth Proportional to 12,868.56, 17,758.71 and 7,279.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,868.56 : 17,758.71 = 7,279.56 : x
2. Step 2: Convert to fraction form
   12,868.56/17,758.71 = 7,279.56/x
3. Step 3: Cross multiply
   12,868.56x = 17,758.71 × 7,279.56
4. Step 4: Simplify right side
   12,868.56x = 129,275,594.97
5. Step 5: Solve for x
   x = 129,275,594.97/12,868.56
6. Step 6: Final answer
   x = 10,045.85