Finding the Fourth Proportional to 19,978.37, 27,570.07 and 11,025.85

Step by Step Solution

1. Step 1: Write the proportion equation
   19,978.37 : 27,570.07 = 11,025.85 : x
2. Step 2: Convert to fraction form
   19,978.37/27,570.07 = 11,025.85/x
3. Step 3: Cross multiply
   19,978.37x = 27,570.07 × 11,025.85
4. Step 4: Simplify right side
   19,978.37x = 303,983,456.31
5. Step 5: Solve for x
   x = 303,983,456.31/19,978.37
6. Step 6: Final answer
   x = 15,215.63