Finding the Fourth Proportional to 21,598.56, 29,805.88 and 12,167.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,598.56 : 29,805.88 = 12,167.12 : x
2. Step 2: Convert to fraction form
   21,598.56/29,805.88 = 12,167.12/x
3. Step 3: Cross multiply
   21,598.56x = 29,805.88 × 12,167.12
4. Step 4: Simplify right side
   21,598.56x = 362,651,718.67
5. Step 5: Solve for x
   x = 362,651,718.67/21,598.56
6. Step 6: Final answer
   x = 16,790.55