Finding the Fourth Proportional to 22,456.14, 30,990.90 and 12,384.60

Step by Step Solution

1. Step 1: Write the proportion equation
   22,456.14 : 30,990.90 = 12,384.60 : x
2. Step 2: Convert to fraction form
   22,456.14/30,990.90 = 12,384.60/x
3. Step 3: Cross multiply
   22,456.14x = 30,990.90 × 12,384.60
4. Step 4: Simplify right side
   22,456.14x = 383,809,838.22
5. Step 5: Solve for x
   x = 383,809,838.22/22,456.14
6. Step 6: Final answer
   x = 17,091.53