Finding the Fourth Proportional to 19,878.37, 27,403.25 and 13,891.46

Step by Step Solution

1. Step 1: Write the proportion equation
   19,878.37 : 27,403.25 = 13,891.46 : x
2. Step 2: Convert to fraction form
   19,878.37/27,403.25 = 13,891.46/x
3. Step 3: Cross multiply
   19,878.37x = 27,403.25 × 13,891.46
4. Step 4: Simplify right side
   19,878.37x = 380,670,944.77
5. Step 5: Solve for x
   x = 380,670,944.77/19,878.37
6. Step 6: Final answer
   x = 19,150.01