Finding the Fourth Proportional to 12,123.78, 18,185.66 and 3,804.53

Step by Step Solution

1. Step 1: Write the proportion equation
   12,123.78 : 18,185.66 = 3,804.53 : x
2. Step 2: Convert to fraction form
   12,123.78/18,185.66 = 3,804.53/x
3. Step 3: Cross multiply
   12,123.78x = 18,185.66 × 3,804.53
4. Step 4: Simplify right side
   12,123.78x = 69,187,779.09
5. Step 5: Solve for x
   x = 69,187,779.09/12,123.78
6. Step 6: Final answer
   x = 5,706.78