Finding the Fourth Proportional to 12,106.89, 18,162.36 and 3,787.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,106.89 : 18,162.36 = 3,787.72 : x
2. Step 2: Convert to fraction form
   12,106.89/18,162.36 = 3,787.72/x
3. Step 3: Cross multiply
   12,106.89x = 18,162.36 × 3,787.72
4. Step 4: Simplify right side
   12,106.89x = 68,793,888.81
5. Step 5: Solve for x
   x = 68,793,888.81/12,106.89
6. Step 6: Final answer
   x = 5,682.21