Finding the Fourth Proportional to 12,086.86, 18,126.99 and 3,319.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,086.86 : 18,126.99 = 3,319.69 : x
2. Step 2: Convert to fraction form
   12,086.86/18,126.99 = 3,319.69/x
3. Step 3: Cross multiply
   12,086.86x = 18,126.99 × 3,319.69
4. Step 4: Simplify right side
   12,086.86x = 60,175,987.43
5. Step 5: Solve for x
   x = 60,175,987.43/12,086.86
6. Step 6: Final answer
   x = 4,978.63