Finding the Fourth Proportional to 21,601.42, 29,809.83 and 12,173.02

Step by Step Solution

1. Step 1: Write the proportion equation
   21,601.42 : 29,809.83 = 12,173.02 : x
2. Step 2: Convert to fraction form
   21,601.42/29,809.83 = 12,173.02/x
3. Step 3: Cross multiply
   21,601.42x = 29,809.83 × 12,173.02
4. Step 4: Simplify right side
   21,601.42x = 362,875,656.79
5. Step 5: Solve for x
   x = 362,875,656.79/21,601.42
6. Step 6: Final answer
   x = 16,798.69