Finding the Fourth Proportional to 37,185.12, 55,765.86 and 12,219.39

Step by Step Solution

1. Step 1: Write the proportion equation
   37,185.12 : 55,765.86 = 12,219.39 : x
2. Step 2: Convert to fraction form
   37,185.12/55,765.86 = 12,219.39/x
3. Step 3: Cross multiply
   37,185.12x = 55,765.86 × 12,219.39
4. Step 4: Simplify right side
   37,185.12x = 681,424,792.03
5. Step 5: Solve for x
   x = 681,424,792.03/37,185.12
6. Step 6: Final answer
   x = 18,325.20