Finding the Fourth Proportional to 2,380.02, 3,569.49 and 918.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,380.02 : 3,569.49 = 918.78 : x
2. Step 2: Convert to fraction form
   2,380.02/3,569.49 = 918.78/x
3. Step 3: Cross multiply
   2,380.02x = 3,569.49 × 918.78
4. Step 4: Simplify right side
   2,380.02x = 3,279,576.02
5. Step 5: Solve for x
   x = 3,279,576.02/2,380.02
6. Step 6: Final answer
   x = 1,377.96