Finding the Fourth Proportional to 36,885.98, 55,315.39 and 13,187.12

Step by Step Solution

1. Step 1: Write the proportion equation
   36,885.98 : 55,315.39 = 13,187.12 : x
2. Step 2: Convert to fraction form
   36,885.98/55,315.39 = 13,187.12/x
3. Step 3: Cross multiply
   36,885.98x = 55,315.39 × 13,187.12
4. Step 4: Simplify right side
   36,885.98x = 729,450,685.78
5. Step 5: Solve for x
   x = 729,450,685.78/36,885.98
6. Step 6: Final answer
   x = 19,775.83