Finding the Fourth Proportional to 3,109.23, 4,663.89 and 918.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,109.23 : 4,663.89 = 918.18 : x
2. Step 2: Convert to fraction form
   3,109.23/4,663.89 = 918.18/x
3. Step 3: Cross multiply
   3,109.23x = 4,663.89 × 918.18
4. Step 4: Simplify right side
   3,109.23x = 4,282,290.52
5. Step 5: Solve for x
   x = 4,282,290.52/3,109.23
6. Step 6: Final answer
   x = 1,377.28