Finding the Fourth Proportional to 1,357.69, 1,873.71 and 768.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357.69 : 1,873.71 = 768.23 : x
2. Step 2: Convert to fraction form
   1,357.69/1,873.71 = 768.23/x
3. Step 3: Cross multiply
   1,357.69x = 1,873.71 × 768.23
4. Step 4: Simplify right side
   1,357.69x = 1,439,440.23
5. Step 5: Solve for x
   x = 1,439,440.23/1,357.69
6. Step 6: Final answer
   x = 1,060.21