Finding the Fourth Proportional to 22,213.79, 30,654.57 and 12,142.30

Step by Step Solution

1. Step 1: Write the proportion equation
   22,213.79 : 30,654.57 = 12,142.30 : x
2. Step 2: Convert to fraction form
   22,213.79/30,654.57 = 12,142.30/x
3. Step 3: Cross multiply
   22,213.79x = 30,654.57 × 12,142.30
4. Step 4: Simplify right side
   22,213.79x = 372,216,985.31
5. Step 5: Solve for x
   x = 372,216,985.31/22,213.79
6. Step 6: Final answer
   x = 16,756.12