Finding the Fourth Proportional to 2,777.57, 4,164.80 and 927.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,777.57 : 4,164.80 = 927.69 : x
2. Step 2: Convert to fraction form
   2,777.57/4,164.80 = 927.69/x
3. Step 3: Cross multiply
   2,777.57x = 4,164.80 × 927.69
4. Step 4: Simplify right side
   2,777.57x = 3,863,628.27
5. Step 5: Solve for x
   x = 3,863,628.27/2,777.57
6. Step 6: Final answer
   x = 1,391.01