Finding the Fourth Proportional to 21,115.69, 31,675.46 and 5,533.31

Step by Step Solution

1. Step 1: Write the proportion equation
   21,115.69 : 31,675.46 = 5,533.31 : x
2. Step 2: Convert to fraction form
   21,115.69/31,675.46 = 5,533.31/x
3. Step 3: Cross multiply
   21,115.69x = 31,675.46 × 5,533.31
4. Step 4: Simplify right side
   21,115.69x = 175,270,191.09
5. Step 5: Solve for x
   x = 175,270,191.09/21,115.69
6. Step 6: Final answer
   x = 8,300.47