Finding the Fourth Proportional to 2,151.15, 3,227.06 and 918.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,151.15 : 3,227.06 = 918.57 : x
2. Step 2: Convert to fraction form
   2,151.15/3,227.06 = 918.57/x
3. Step 3: Cross multiply
   2,151.15x = 3,227.06 × 918.57
4. Step 4: Simplify right side
   2,151.15x = 2,964,275.91
5. Step 5: Solve for x
   x = 2,964,275.91/2,151.15
6. Step 6: Final answer
   x = 1,378.00