Finding the Fourth Proportional to 2,152.02, 3,227.10 and 918.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.02 : 3,227.10 = 918.78 : x
2. Step 2: Convert to fraction form
   2,152.02/3,227.10 = 918.78/x
3. Step 3: Cross multiply
   2,152.02x = 3,227.10 × 918.78
4. Step 4: Simplify right side
   2,152.02x = 2,964,994.94
5. Step 5: Solve for x
   x = 2,964,994.94/2,152.02
6. Step 6: Final answer
   x = 1,377.77