Finding the Fourth Proportional to 21,496, 29,669.60 and 13,119.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,496 : 29,669.60 = 13,119.52 : x
2. Step 2: Convert to fraction form
   21,496/29,669.60 = 13,119.52/x
3. Step 3: Cross multiply
   21,496x = 29,669.60 × 13,119.52
4. Step 4: Simplify right side
   21,496x = 389,250,910.59
5. Step 5: Solve for x
   x = 389,250,910.59/21,496
6. Step 6: Final answer
   x = 18,108.06