Finding the Fourth Proportional to 2,658.56, 3,989.67 and 927.19

Step by Step Solution

1. Step 1: Write the proportion equation
   2,658.56 : 3,989.67 = 927.19 : x
2. Step 2: Convert to fraction form
   2,658.56/3,989.67 = 927.19/x
3. Step 3: Cross multiply
   2,658.56x = 3,989.67 × 927.19
4. Step 4: Simplify right side
   2,658.56x = 3,699,172.15
5. Step 5: Solve for x
   x = 3,699,172.15/2,658.56
6. Step 6: Final answer
   x = 1,391.42