Finding the Fourth Proportional to 37,155.31, 55,721.25 and 12,189.54

Step by Step Solution

1. Step 1: Write the proportion equation
   37,155.31 : 55,721.25 = 12,189.54 : x
2. Step 2: Convert to fraction form
   37,155.31/55,721.25 = 12,189.54/x
3. Step 3: Cross multiply
   37,155.31x = 55,721.25 × 12,189.54
4. Step 4: Simplify right side
   37,155.31x = 679,216,436.20
5. Step 5: Solve for x
   x = 679,216,436.20/37,155.31
6. Step 6: Final answer
   x = 18,280.47