Finding the Fourth Proportional to 2,151.04, 3,227.76 and 918.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,151.04 : 3,227.76 = 918.31 : x
2. Step 2: Convert to fraction form
   2,151.04/3,227.76 = 918.31/x
3. Step 3: Cross multiply
   2,151.04x = 3,227.76 × 918.31
4. Step 4: Simplify right side
   2,151.04x = 2,964,084.29
5. Step 5: Solve for x
   x = 2,964,084.29/2,151.04
6. Step 6: Final answer
   x = 1,377.98