Finding the Fourth Proportional to 1,153.07, 1,719.89 and 1,118.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,153.07 : 1,719.89 = 1,118.49 : x
2. Step 2: Convert to fraction form
   1,153.07/1,719.89 = 1,118.49/x
3. Step 3: Cross multiply
   1,153.07x = 1,719.89 × 1,118.49
4. Step 4: Simplify right side
   1,153.07x = 1,923,665.57
5. Step 5: Solve for x
   x = 1,923,665.57/1,153.07
6. Step 6: Final answer
   x = 1,668.30