Finding the Fourth Proportional to 12,918.62, 17,827.72 and 8,449.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,918.62 : 17,827.72 = 8,449.94 : x
2. Step 2: Convert to fraction form
   12,918.62/17,827.72 = 8,449.94/x
3. Step 3: Cross multiply
   12,918.62x = 17,827.72 × 8,449.94
4. Step 4: Simplify right side
   12,918.62x = 150,643,164.34
5. Step 5: Solve for x
   x = 150,643,164.34/12,918.62
6. Step 6: Final answer
   x = 11,660.93