Finding the Fourth Proportional to 2,775.57, 4,164.41 and 1,388.95

Step by Step Solution

1. Step 1: Write the proportion equation
   2,775.57 : 4,164.41 = 1,388.95 : x
2. Step 2: Convert to fraction form
   2,775.57/4,164.41 = 1,388.95/x
3. Step 3: Cross multiply
   2,775.57x = 4,164.41 × 1,388.95
4. Step 4: Simplify right side
   2,775.57x = 5,784,150.33
5. Step 5: Solve for x
   x = 5,784,150.33/2,775.57
6. Step 6: Final answer
   x = 2,083.95