Finding the Fourth Proportional to 37,309.98, 55,951.53 and 12,345.42

Step by Step Solution

1. Step 1: Write the proportion equation
   37,309.98 : 55,951.53 = 12,345.42 : x
2. Step 2: Convert to fraction form
   37,309.98/55,951.53 = 12,345.42/x
3. Step 3: Cross multiply
   37,309.98x = 55,951.53 × 12,345.42
4. Step 4: Simplify right side
   37,309.98x = 690,745,137.49
5. Step 5: Solve for x
   x = 690,745,137.49/37,309.98
6. Step 6: Final answer
   x = 18,513.68