Finding the Fourth Proportional to 1,141.72, 1,573.25 and 787.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141.72 : 1,573.25 = 787.75 : x
2. Step 2: Convert to fraction form
   1,141.72/1,573.25 = 787.75/x
3. Step 3: Cross multiply
   1,141.72x = 1,573.25 × 787.75
4. Step 4: Simplify right side
   1,141.72x = 1,239,327.69
5. Step 5: Solve for x
   x = 1,239,327.69/1,141.72
6. Step 6: Final answer
   x = 1,085.49