Finding the Fourth Proportional to 14,308.69, 21,459.16 and 5,987

Step by Step Solution

1. Step 1: Write the proportion equation
   14,308.69 : 21,459.16 = 5,987 : x
2. Step 2: Convert to fraction form
   14,308.69/21,459.16 = 5,987/x
3. Step 3: Cross multiply
   14,308.69x = 21,459.16 × 5,987
4. Step 4: Simplify right side
   14,308.69x = 128,475,990.92
5. Step 5: Solve for x
   x = 128,475,990.92/14,308.69
6. Step 6: Final answer
   x = 8,978.88