Finding the Fourth Proportional to 12,834.86, 17,711.08 and 7,169.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,834.86 : 17,711.08 = 7,169.15 : x
2. Step 2: Convert to fraction form
   12,834.86/17,711.08 = 7,169.15/x
3. Step 3: Cross multiply
   12,834.86x = 17,711.08 × 7,169.15
4. Step 4: Simplify right side
   12,834.86x = 126,973,415.54
5. Step 5: Solve for x
   x = 126,973,415.54/12,834.86
6. Step 6: Final answer
   x = 9,892.86