Finding the Fourth Proportional to 13,667.88, 18,863.34 and 7,699.80

Step by Step Solution

1. Step 1: Write the proportion equation
   13,667.88 : 18,863.34 = 7,699.80 : x
2. Step 2: Convert to fraction form
   13,667.88/18,863.34 = 7,699.80/x
3. Step 3: Cross multiply
   13,667.88x = 18,863.34 × 7,699.80
4. Step 4: Simplify right side
   13,667.88x = 145,243,945.33
5. Step 5: Solve for x
   x = 145,243,945.33/13,667.88
6. Step 6: Final answer
   x = 10,626.66