Finding the Fourth Proportional to 2,674.76, 4,012.34 and 919.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,674.76 : 4,012.34 = 919.89 : x
2. Step 2: Convert to fraction form
   2,674.76/4,012.34 = 919.89/x
3. Step 3: Cross multiply
   2,674.76x = 4,012.34 × 919.89
4. Step 4: Simplify right side
   2,674.76x = 3,690,906.84
5. Step 5: Solve for x
   x = 3,690,906.84/2,674.76
6. Step 6: Final answer
   x = 1,379.90