Finding the Fourth Proportional to 12,087.42, 18,127.02 and 4,188.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,087.42 : 18,127.02 = 4,188.09 : x
2. Step 2: Convert to fraction form
   12,087.42/18,127.02 = 4,188.09/x
3. Step 3: Cross multiply
   12,087.42x = 18,127.02 × 4,188.09
4. Step 4: Simplify right side
   12,087.42x = 75,917,596.43
5. Step 5: Solve for x
   x = 75,917,596.43/12,087.42
6. Step 6: Final answer
   x = 6,280.71