Finding the Fourth Proportional to 12,086.30, 18,127.42 and 3,319.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,086.30 : 18,127.42 = 3,319.18 : x
2. Step 2: Convert to fraction form
   12,086.30/18,127.42 = 3,319.18/x
3. Step 3: Cross multiply
   12,086.30x = 18,127.42 × 3,319.18
4. Step 4: Simplify right side
   12,086.30x = 60,168,116.30
5. Step 5: Solve for x
   x = 60,168,116.30/12,086.30
6. Step 6: Final answer
   x = 4,978.21