Finding the Fourth Proportional to 1,918.37, 2,877.83 and 685.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,918.37 : 2,877.83 = 685.52 : x
2. Step 2: Convert to fraction form
   1,918.37/2,877.83 = 685.52/x
3. Step 3: Cross multiply
   1,918.37x = 2,877.83 × 685.52
4. Step 4: Simplify right side
   1,918.37x = 1,972,810.02
5. Step 5: Solve for x
   x = 1,972,810.02/1,918.37
6. Step 6: Final answer
   x = 1,028.38