Finding the Fourth Proportional to 12,913.14, 17,802.12 and 8,656.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,913.14 : 17,802.12 = 8,656.80 : x
2. Step 2: Convert to fraction form
   12,913.14/17,802.12 = 8,656.80/x
3. Step 3: Cross multiply
   12,913.14x = 17,802.12 × 8,656.80
4. Step 4: Simplify right side
   12,913.14x = 154,109,392.42
5. Step 5: Solve for x
   x = 154,109,392.42/12,913.14
6. Step 6: Final answer
   x = 11,934.31