Finding the Fourth Proportional to 1,357.86, 1,874.04 and 768.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357.86 : 1,874.04 = 768.39 : x
2. Step 2: Convert to fraction form
   1,357.86/1,874.04 = 768.39/x
3. Step 3: Cross multiply
   1,357.86x = 1,874.04 × 768.39
4. Step 4: Simplify right side
   1,357.86x = 1,439,983.69
5. Step 5: Solve for x
   x = 1,439,983.69/1,357.86
6. Step 6: Final answer
   x = 1,060.48