Finding the Fourth Proportional to 1,357.67, 1,873.46 and 768.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357.67 : 1,873.46 = 768.09 : x
2. Step 2: Convert to fraction form
   1,357.67/1,873.46 = 768.09/x
3. Step 3: Cross multiply
   1,357.67x = 1,873.46 × 768.09
4. Step 4: Simplify right side
   1,357.67x = 1,438,982.05
5. Step 5: Solve for x
   x = 1,438,982.05/1,357.67
6. Step 6: Final answer
   x = 1,059.89