Finding the Fourth Proportional to 21,606.42, 29,816.73 and 12,178.02

Step by Step Solution

1. Step 1: Write the proportion equation
   21,606.42 : 29,816.73 = 12,178.02 : x
2. Step 2: Convert to fraction form
   21,606.42/29,816.73 = 12,178.02/x
3. Step 3: Cross multiply
   21,606.42x = 29,816.73 × 12,178.02
4. Step 4: Simplify right side
   21,606.42x = 363,108,734.27
5. Step 5: Solve for x
   x = 363,108,734.27/21,606.42
6. Step 6: Final answer
   x = 16,805.59