Finding the Fourth Proportional to 1,357.93, 1,874.01 and 768.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357.93 : 1,874.01 = 768.61 : x
2. Step 2: Convert to fraction form
   1,357.93/1,874.01 = 768.61/x
3. Step 3: Cross multiply
   1,357.93x = 1,874.01 × 768.61
4. Step 4: Simplify right side
   1,357.93x = 1,440,382.83
5. Step 5: Solve for x
   x = 1,440,382.83/1,357.93
6. Step 6: Final answer
   x = 1,060.72