Finding the Fourth Proportional to 37,016.76, 55,513.62 and 12,387

Step by Step Solution

1. Step 1: Write the proportion equation
   37,016.76 : 55,513.62 = 12,387 : x
2. Step 2: Convert to fraction form
   37,016.76/55,513.62 = 12,387/x
3. Step 3: Cross multiply
   37,016.76x = 55,513.62 × 12,387
4. Step 4: Simplify right side
   37,016.76x = 687,647,210.94
5. Step 5: Solve for x
   x = 687,647,210.94/37,016.76
6. Step 6: Final answer
   x = 18,576.65