Finding the Fourth Proportional to 21,519.99, 32,300.46 and 13,216.20

Step by Step Solution

1. Step 1: Write the proportion equation
   21,519.99 : 32,300.46 = 13,216.20 : x
2. Step 2: Convert to fraction form
   21,519.99/32,300.46 = 13,216.20/x
3. Step 3: Cross multiply
   21,519.99x = 32,300.46 × 13,216.20
4. Step 4: Simplify right side
   21,519.99x = 426,889,339.45
5. Step 5: Solve for x
   x = 426,889,339.45/21,519.99
6. Step 6: Final answer
   x = 19,836.87