Finding the Fourth Proportional to 36,978.73, 55,440.39 and 12,003.87

Step by Step Solution

1. Step 1: Write the proportion equation
   36,978.73 : 55,440.39 = 12,003.87 : x
2. Step 2: Convert to fraction form
   36,978.73/55,440.39 = 12,003.87/x
3. Step 3: Cross multiply
   36,978.73x = 55,440.39 × 12,003.87
4. Step 4: Simplify right side
   36,978.73x = 665,499,234.31
5. Step 5: Solve for x
   x = 665,499,234.31/36,978.73
6. Step 6: Final answer
   x = 17,996.81