Finding the Fourth Proportional to 21,596.17, 29,802.05 and 12,164.53

Step by Step Solution

1. Step 1: Write the proportion equation
   21,596.17 : 29,802.05 = 12,164.53 : x
2. Step 2: Convert to fraction form
   21,596.17/29,802.05 = 12,164.53/x
3. Step 3: Cross multiply
   21,596.17x = 29,802.05 × 12,164.53
4. Step 4: Simplify right side
   21,596.17x = 362,527,870.46
5. Step 5: Solve for x
   x = 362,527,870.46/21,596.17
6. Step 6: Final answer
   x = 16,786.67