Finding the Fourth Proportional to 2,399.32, 3,311.61 and 1,558.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,399.32 : 3,311.61 = 1,558.56 : x
2. Step 2: Convert to fraction form
   2,399.32/3,311.61 = 1,558.56/x
3. Step 3: Cross multiply
   2,399.32x = 3,311.61 × 1,558.56
4. Step 4: Simplify right side
   2,399.32x = 5,161,338.99
5. Step 5: Solve for x
   x = 5,161,338.99/2,399.32
6. Step 6: Final answer
   x = 2,151.17