Finding the Fourth Proportional to 13,667.26, 18,861.79 and 7,617.89

Step by Step Solution

1. Step 1: Write the proportion equation
   13,667.26 : 18,861.79 = 7,617.89 : x
2. Step 2: Convert to fraction form
   13,667.26/18,861.79 = 7,617.89/x
3. Step 3: Cross multiply
   13,667.26x = 18,861.79 × 7,617.89
4. Step 4: Simplify right side
   13,667.26x = 143,687,041.42
5. Step 5: Solve for x
   x = 143,687,041.42/13,667.26
6. Step 6: Final answer
   x = 10,513.23