Finding the Fourth Proportional to 1,868.75, 2,801.81 and 828.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,868.75 : 2,801.81 = 828.18 : x
2. Step 2: Convert to fraction form
   1,868.75/2,801.81 = 828.18/x
3. Step 3: Cross multiply
   1,868.75x = 2,801.81 × 828.18
4. Step 4: Simplify right side
   1,868.75x = 2,320,398.86
5. Step 5: Solve for x
   x = 2,320,398.86/1,868.75
6. Step 6: Final answer
   x = 1,241.69