Finding the Fourth Proportional to 37,185.63, 55,766.61 and 12,219.90

Step by Step Solution

1. Step 1: Write the proportion equation
   37,185.63 : 55,766.61 = 12,219.90 : x
2. Step 2: Convert to fraction form
   37,185.63/55,766.61 = 12,219.90/x
3. Step 3: Cross multiply
   37,185.63x = 55,766.61 × 12,219.90
4. Step 4: Simplify right side
   37,185.63x = 681,462,397.54
5. Step 5: Solve for x
   x = 681,462,397.54/37,185.63
6. Step 6: Final answer
   x = 18,325.96