Finding the Fourth Proportional to 21,995.42, 30,352.88 and 13,037.63

Step by Step Solution

1. Step 1: Write the proportion equation
   21,995.42 : 30,352.88 = 13,037.63 : x
2. Step 2: Convert to fraction form
   21,995.42/30,352.88 = 13,037.63/x
3. Step 3: Cross multiply
   21,995.42x = 30,352.88 × 13,037.63
4. Step 4: Simplify right side
   21,995.42x = 395,729,499.70
5. Step 5: Solve for x
   x = 395,729,499.70/21,995.42
6. Step 6: Final answer
   x = 17,991.45