Finding the Fourth Proportional to 12,411.11, 18,612.71 and 4,089.57

Step by Step Solution

1. Step 1: Write the proportion equation
   12,411.11 : 18,612.71 = 4,089.57 : x
2. Step 2: Convert to fraction form
   12,411.11/18,612.71 = 4,089.57/x
3. Step 3: Cross multiply
   12,411.11x = 18,612.71 × 4,089.57
4. Step 4: Simplify right side
   12,411.11x = 76,117,975.32
5. Step 5: Solve for x
   x = 76,117,975.32/12,411.11
6. Step 6: Final answer
   x = 6,133.05