Finding the Fourth Proportional to 10,878.52, 15,004.67 and 9,259.29

Step by Step Solution

1. Step 1: Write the proportion equation
   10,878.52 : 15,004.67 = 9,259.29 : x
2. Step 2: Convert to fraction form
   10,878.52/15,004.67 = 9,259.29/x
3. Step 3: Cross multiply
   10,878.52x = 15,004.67 × 9,259.29
4. Step 4: Simplify right side
   10,878.52x = 138,932,590.88
5. Step 5: Solve for x
   x = 138,932,590.88/10,878.52
6. Step 6: Final answer
   x = 12,771.28