Finding the Fourth Proportional to 22,449.12, 30,979.52 and 12,377.28

Step by Step Solution

1. Step 1: Write the proportion equation
   22,449.12 : 30,979.52 = 12,377.28 : x
2. Step 2: Convert to fraction form
   22,449.12/30,979.52 = 12,377.28/x
3. Step 3: Cross multiply
   22,449.12x = 30,979.52 × 12,377.28
4. Step 4: Simplify right side
   22,449.12x = 383,442,193.31
5. Step 5: Solve for x
   x = 383,442,193.31/22,449.12
6. Step 6: Final answer
   x = 17,080.50