Finding the Fourth Proportional to 10,721.63, 16,072.85 and 5,453.69

Step by Step Solution

1. Step 1: Write the proportion equation
   10,721.63 : 16,072.85 = 5,453.69 : x
2. Step 2: Convert to fraction form
   10,721.63/16,072.85 = 5,453.69/x
3. Step 3: Cross multiply
   10,721.63x = 16,072.85 × 5,453.69
4. Step 4: Simplify right side
   10,721.63x = 87,656,274.59
5. Step 5: Solve for x
   x = 87,656,274.59/10,721.63
6. Step 6: Final answer
   x = 8,175.65