Finding the Fourth Proportional to 12,105.79, 18,158.04 and 3,784.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,105.79 : 18,158.04 = 3,784.86 : x
2. Step 2: Convert to fraction form
   12,105.79/18,158.04 = 3,784.86/x
3. Step 3: Cross multiply
   12,105.79x = 18,158.04 × 3,784.86
4. Step 4: Simplify right side
   12,105.79x = 68,725,639.27
5. Step 5: Solve for x
   x = 68,725,639.27/12,105.79
6. Step 6: Final answer
   x = 5,677.09