Finding the Fourth Proportional to 2,919.84, 4,380.72 and 1,189.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,919.84 : 4,380.72 = 1,189.92 : x
2. Step 2: Convert to fraction form
   2,919.84/4,380.72 = 1,189.92/x
3. Step 3: Cross multiply
   2,919.84x = 4,380.72 × 1,189.92
4. Step 4: Simplify right side
   2,919.84x = 5,212,706.34
5. Step 5: Solve for x
   x = 5,212,706.34/2,919.84
6. Step 6: Final answer
   x = 1,785.27