Finding the Fourth Proportional to 14,287.44, 19,714.33 and 8,978.50

Step by Step Solution

1. Step 1: Write the proportion equation
   14,287.44 : 19,714.33 = 8,978.50 : x
2. Step 2: Convert to fraction form
   14,287.44/19,714.33 = 8,978.50/x
3. Step 3: Cross multiply
   14,287.44x = 19,714.33 × 8,978.50
4. Step 4: Simplify right side
   14,287.44x = 177,005,111.91
5. Step 5: Solve for x
   x = 177,005,111.91/14,287.44
6. Step 6: Final answer
   x = 12,388.86