Finding the Fourth Proportional to 2,380.82, 3,569.97 and 918.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,380.82 : 3,569.97 = 918.50 : x
2. Step 2: Convert to fraction form
   2,380.82/3,569.97 = 918.50/x
3. Step 3: Cross multiply
   2,380.82x = 3,569.97 × 918.50
4. Step 4: Simplify right side
   2,380.82x = 3,279,017.45
5. Step 5: Solve for x
   x = 3,279,017.45/2,380.82
6. Step 6: Final answer
   x = 1,377.26