Finding the Fourth Proportional to 7,105.68, 10,658.64 and 1,911.57

Step by Step Solution

1. Step 1: Write the proportion equation
   7,105.68 : 10,658.64 = 1,911.57 : x
2. Step 2: Convert to fraction form
   7,105.68/10,658.64 = 1,911.57/x
3. Step 3: Cross multiply
   7,105.68x = 10,658.64 × 1,911.57
4. Step 4: Simplify right side
   7,105.68x = 20,374,736.46
5. Step 5: Solve for x
   x = 20,374,736.46/7,105.68
6. Step 6: Final answer
   x = 2,867.39