Finding the Fourth Proportional to 2,673.72, 4,010.64 and 918.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,673.72 : 4,010.64 = 918.71 : x
2. Step 2: Convert to fraction form
   2,673.72/4,010.64 = 918.71/x
3. Step 3: Cross multiply
   2,673.72x = 4,010.64 × 918.71
4. Step 4: Simplify right side
   2,673.72x = 3,684,611.78
5. Step 5: Solve for x
   x = 3,684,611.78/2,673.72
6. Step 6: Final answer
   x = 1,378.08