Finding the Fourth Proportional to 10,920.69, 16,364.52 and 8,134.29

Step by Step Solution

1. Step 1: Write the proportion equation
   10,920.69 : 16,364.52 = 8,134.29 : x
2. Step 2: Convert to fraction form
   10,920.69/16,364.52 = 8,134.29/x
3. Step 3: Cross multiply
   10,920.69x = 16,364.52 × 8,134.29
4. Step 4: Simplify right side
   10,920.69x = 133,113,751.39
5. Step 5: Solve for x
   x = 133,113,751.39/10,920.69
6. Step 6: Final answer
   x = 12,189.13