Finding the Fourth Proportional to 12,185.46, 18,285.71 and 4,788.62

Step by Step Solution

1. Step 1: Write the proportion equation
   12,185.46 : 18,285.71 = 4,788.62 : x
2. Step 2: Convert to fraction form
   12,185.46/18,285.71 = 4,788.62/x
3. Step 3: Cross multiply
   12,185.46x = 18,285.71 × 4,788.62
4. Step 4: Simplify right side
   12,185.46x = 87,563,316.62
5. Step 5: Solve for x
   x = 87,563,316.62/12,185.46
6. Step 6: Final answer
   x = 7,185.89