Finding the Fourth Proportional to 7,021.56, 9,689.72 and 3,834.89

Step by Step Solution

1. Step 1: Write the proportion equation
   7,021.56 : 9,689.72 = 3,834.89 : x
2. Step 2: Convert to fraction form
   7,021.56/9,689.72 = 3,834.89/x
3. Step 3: Cross multiply
   7,021.56x = 9,689.72 × 3,834.89
4. Step 4: Simplify right side
   7,021.56x = 37,158,942.71
5. Step 5: Solve for x
   x = 37,158,942.71/7,021.56
6. Step 6: Final answer
   x = 5,292.12