Finding the Fourth Proportional to 12,804.69, 19,177.55 and 12,361.43

Step by Step Solution

1. Step 1: Write the proportion equation
   12,804.69 : 19,177.55 = 12,361.43 : x
2. Step 2: Convert to fraction form
   12,804.69/19,177.55 = 12,361.43/x
3. Step 3: Cross multiply
   12,804.69x = 19,177.55 × 12,361.43
4. Step 4: Simplify right side
   12,804.69x = 237,061,784.20
5. Step 5: Solve for x
   x = 237,061,784.20/12,804.69
6. Step 6: Final answer
   x = 18,513.67