Finding the Fourth Proportional to 19,919.67, 27,511.89 and 13,535.60

Step by Step Solution

1. Step 1: Write the proportion equation
   19,919.67 : 27,511.89 = 13,535.60 : x
2. Step 2: Convert to fraction form
   19,919.67/27,511.89 = 13,535.60/x
3. Step 3: Cross multiply
   19,919.67x = 27,511.89 × 13,535.60
4. Step 4: Simplify right side
   19,919.67x = 372,389,800.72
5. Step 5: Solve for x
   x = 372,389,800.72/19,919.67
6. Step 6: Final answer
   x = 18,694.58