Finding the Fourth Proportional to 1,141.52, 1,574.21 and 786.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141.52 : 1,574.21 = 786.87 : x
2. Step 2: Convert to fraction form
   1,141.52/1,574.21 = 786.87/x
3. Step 3: Cross multiply
   1,141.52x = 1,574.21 × 786.87
4. Step 4: Simplify right side
   1,141.52x = 1,238,694.69
5. Step 5: Solve for x
   x = 1,238,694.69/1,141.52
6. Step 6: Final answer
   x = 1,085.13