Finding the Fourth Proportional to 1,151.73, 1,719.77 and 918

Step by Step Solution

1. Step 1: Write the proportion equation
   1,151.73 : 1,719.77 = 918 : x
2. Step 2: Convert to fraction form
   1,151.73/1,719.77 = 918/x
3. Step 3: Cross multiply
   1,151.73x = 1,719.77 × 918
4. Step 4: Simplify right side
   1,151.73x = 1,578,744.27
5. Step 5: Solve for x
   x = 1,578,744.27/1,151.73
6. Step 6: Final answer
   x = 1,370.76