Finding the Fourth Proportional to 12,876.48, 17,769.60 and 7,288.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,876.48 : 17,769.60 = 7,288.56 : x
2. Step 2: Convert to fraction form
   12,876.48/17,769.60 = 7,288.56/x
3. Step 3: Cross multiply
   12,876.48x = 17,769.60 × 7,288.56
4. Step 4: Simplify right side
   12,876.48x = 129,514,795.78
5. Step 5: Solve for x
   x = 129,514,795.78/12,876.48
6. Step 6: Final answer
   x = 10,058.25