Finding the Fourth Proportional to 10,878.88, 16,290.62 and 7,169.86

Step by Step Solution

1. Step 1: Write the proportion equation
   10,878.88 : 16,290.62 = 7,169.86 : x
2. Step 2: Convert to fraction form
   10,878.88/16,290.62 = 7,169.86/x
3. Step 3: Cross multiply
   10,878.88x = 16,290.62 × 7,169.86
4. Step 4: Simplify right side
   10,878.88x = 116,801,464.66
5. Step 5: Solve for x
   x = 116,801,464.66/10,878.88
6. Step 6: Final answer
   x = 10,736.54