Finding the Fourth Proportional to 2,268.95, 3,131.39 and 1,385.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,268.95 : 3,131.39 = 1,385.28 : x
2. Step 2: Convert to fraction form
   2,268.95/3,131.39 = 1,385.28/x
3. Step 3: Cross multiply
   2,268.95x = 3,131.39 × 1,385.28
4. Step 4: Simplify right side
   2,268.95x = 4,337,851.94
5. Step 5: Solve for x
   x = 4,337,851.94/2,268.95
6. Step 6: Final answer
   x = 1,911.83