Finding the Fourth Proportional to 21,913.77, 30,241.89 and 12,354.02

Step by Step Solution

1. Step 1: Write the proportion equation
   21,913.77 : 30,241.89 = 12,354.02 : x
2. Step 2: Convert to fraction form
   21,913.77/30,241.89 = 12,354.02/x
3. Step 3: Cross multiply
   21,913.77x = 30,241.89 × 12,354.02
4. Step 4: Simplify right side
   21,913.77x = 373,608,913.90
5. Step 5: Solve for x
   x = 373,608,913.90/21,913.77
6. Step 6: Final answer
   x = 17,049.05