Finding the Fourth Proportional to 12,086.20, 18,134.70 and 4,300.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,086.20 : 18,134.70 = 4,300.60 : x
2. Step 2: Convert to fraction form
   12,086.20/18,134.70 = 4,300.60/x
3. Step 3: Cross multiply
   12,086.20x = 18,134.70 × 4,300.60
4. Step 4: Simplify right side
   12,086.20x = 77,990,090.82
5. Step 5: Solve for x
   x = 77,990,090.82/12,086.20
6. Step 6: Final answer
   x = 6,452.82