Finding the Fourth Proportional to 22,336.55, 30,824.48 and 12,905.12

Step by Step Solution

1. Step 1: Write the proportion equation
   22,336.55 : 30,824.48 = 12,905.12 : x
2. Step 2: Convert to fraction form
   22,336.55/30,824.48 = 12,905.12/x
3. Step 3: Cross multiply
   22,336.55x = 30,824.48 × 12,905.12
4. Step 4: Simplify right side
   22,336.55x = 397,793,394.69
5. Step 5: Solve for x
   x = 397,793,394.69/22,336.55
6. Step 6: Final answer
   x = 17,809.08