Finding the Fourth Proportional to 1,141.49, 1,574.92 and 768.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141.49 : 1,574.92 = 768.89 : x
2. Step 2: Convert to fraction form
   1,141.49/1,574.92 = 768.89/x
3. Step 3: Cross multiply
   1,141.49x = 1,574.92 × 768.89
4. Step 4: Simplify right side
   1,141.49x = 1,210,928.52
5. Step 5: Solve for x
   x = 1,210,928.52/1,141.49
6. Step 6: Final answer
   x = 1,060.84