Finding the Fourth Proportional to 12,188.54, 18,285.57 and 3,869.06

Step by Step Solution

1. Step 1: Write the proportion equation
   12,188.54 : 18,285.57 = 3,869.06 : x
2. Step 2: Convert to fraction form
   12,188.54/18,285.57 = 3,869.06/x
3. Step 3: Cross multiply
   12,188.54x = 18,285.57 × 3,869.06
4. Step 4: Simplify right side
   12,188.54x = 70,747,967.46
5. Step 5: Solve for x
   x = 70,747,967.46/12,188.54
6. Step 6: Final answer
   x = 5,804.47