Finding the Fourth Proportional to 22,449.20, 30,979.30 and 12,377.47

Step by Step Solution

1. Step 1: Write the proportion equation
   22,449.20 : 30,979.30 = 12,377.47 : x
2. Step 2: Convert to fraction form
   22,449.20/30,979.30 = 12,377.47/x
3. Step 3: Cross multiply
   22,449.20x = 30,979.30 × 12,377.47
4. Step 4: Simplify right side
   22,449.20x = 383,445,329.27
5. Step 5: Solve for x
   x = 383,445,329.27/22,449.20
6. Step 6: Final answer
   x = 17,080.58