Finding the Fourth Proportional to 13,626.97, 18,805.59 and 7,659.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,626.97 : 18,805.59 = 7,659.18 : x
2. Step 2: Convert to fraction form
   13,626.97/18,805.59 = 7,659.18/x
3. Step 3: Cross multiply
   13,626.97x = 18,805.59 × 7,659.18
4. Step 4: Simplify right side
   13,626.97x = 144,035,398.82
5. Step 5: Solve for x
   x = 144,035,398.82/13,626.97
6. Step 6: Final answer
   x = 10,569.88