Finding the Fourth Proportional to 7,111.49, 9,815.78 and 4,126.73

Step by Step Solution

1. Step 1: Write the proportion equation
   7,111.49 : 9,815.78 = 4,126.73 : x
2. Step 2: Convert to fraction form
   7,111.49/9,815.78 = 4,126.73/x
3. Step 3: Cross multiply
   7,111.49x = 9,815.78 × 4,126.73
4. Step 4: Simplify right side
   7,111.49x = 40,507,035.04
5. Step 5: Solve for x
   x = 40,507,035.04/7,111.49
6. Step 6: Final answer
   x = 5,696.00