Finding the Fourth Proportional to 2,920.79, 4,380.83 and 1,189.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,920.79 : 4,380.83 = 1,189.43 : x
2. Step 2: Convert to fraction form
   2,920.79/4,380.83 = 1,189.43/x
3. Step 3: Cross multiply
   2,920.79x = 4,380.83 × 1,189.43
4. Step 4: Simplify right side
   2,920.79x = 5,210,684.68
5. Step 5: Solve for x
   x = 5,210,684.68/2,920.79
6. Step 6: Final answer
   x = 1,784.00