Finding the Fourth Proportional to 1,375.57, 2,065.18 and 828.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.57 : 2,065.18 = 828.82 : x
2. Step 2: Convert to fraction form
   1,375.57/2,065.18 = 828.82/x
3. Step 3: Cross multiply
   1,375.57x = 2,065.18 × 828.82
4. Step 4: Simplify right side
   1,375.57x = 1,711,662.49
5. Step 5: Solve for x
   x = 1,711,662.49/1,375.57
6. Step 6: Final answer
   x = 1,244.33