Finding the Fourth Proportional to 7,021.83, 9,693.78 and 5,131.29

Step by Step Solution

1. Step 1: Write the proportion equation
   7,021.83 : 9,693.78 = 5,131.29 : x
2. Step 2: Convert to fraction form
   7,021.83/9,693.78 = 5,131.29/x
3. Step 3: Cross multiply
   7,021.83x = 9,693.78 × 5,131.29
4. Step 4: Simplify right side
   7,021.83x = 49,741,596.38
5. Step 5: Solve for x
   x = 49,741,596.38/7,021.83
6. Step 6: Final answer
   x = 7,083.85