Finding the Fourth Proportional to 1,153.73, 1,592.13 and 687.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,153.73 : 1,592.13 = 687.89 : x
2. Step 2: Convert to fraction form
   1,153.73/1,592.13 = 687.89/x
3. Step 3: Cross multiply
   1,153.73x = 1,592.13 × 687.89
4. Step 4: Simplify right side
   1,153.73x = 1,095,210.31
5. Step 5: Solve for x
   x = 1,095,210.31/1,153.73
6. Step 6: Final answer
   x = 949.28