Finding the Fourth Proportional to 7,111.14, 9,815.34 and 4,127.94

Step by Step Solution

1. Step 1: Write the proportion equation
   7,111.14 : 9,815.34 = 4,127.94 : x
2. Step 2: Convert to fraction form
   7,111.14/9,815.34 = 4,127.94/x
3. Step 3: Cross multiply
   7,111.14x = 9,815.34 × 4,127.94
4. Step 4: Simplify right side
   7,111.14x = 40,517,134.60
5. Step 5: Solve for x
   x = 40,517,134.60/7,111.14
6. Step 6: Final answer
   x = 5,697.70