Finding the Fourth Proportional to 13,647.62, 18,833.50 and 7,679.29

Step by Step Solution

1. Step 1: Write the proportion equation
   13,647.62 : 18,833.50 = 7,679.29 : x
2. Step 2: Convert to fraction form
   13,647.62/18,833.50 = 7,679.29/x
3. Step 3: Cross multiply
   13,647.62x = 18,833.50 × 7,679.29
4. Step 4: Simplify right side
   13,647.62x = 144,627,775.65
5. Step 5: Solve for x
   x = 144,627,775.65/13,647.62
6. Step 6: Final answer
   x = 10,597.29