Finding the Fourth Proportional to 2,311.05, 3,189.24 and 1,316.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,311.05 : 3,189.24 = 1,316.32 : x
2. Step 2: Convert to fraction form
   2,311.05/3,189.24 = 1,316.32/x
3. Step 3: Cross multiply
   2,311.05x = 3,189.24 × 1,316.32
4. Step 4: Simplify right side
   2,311.05x = 4,198,053.82
5. Step 5: Solve for x
   x = 4,198,053.82/2,311.05
6. Step 6: Final answer
   x = 1,816.52