Finding the Fourth Proportional to 21,100.50, 29,118.69 and 11,669.67

Step by Step Solution

1. Step 1: Write the proportion equation
   21,100.50 : 29,118.69 = 11,669.67 : x
2. Step 2: Convert to fraction form
   21,100.50/29,118.69 = 11,669.67/x
3. Step 3: Cross multiply
   21,100.50x = 29,118.69 × 11,669.67
4. Step 4: Simplify right side
   21,100.50x = 339,805,503.13
5. Step 5: Solve for x
   x = 339,805,503.13/21,100.50
6. Step 6: Final answer
   x = 16,104.14