Finding the Fourth Proportional to 2,306.59, 3,457.76 and 919.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,306.59 : 3,457.76 = 919.59 : x
2. Step 2: Convert to fraction form
   2,306.59/3,457.76 = 919.59/x
3. Step 3: Cross multiply
   2,306.59x = 3,457.76 × 919.59
4. Step 4: Simplify right side
   2,306.59x = 3,179,735.06
5. Step 5: Solve for x
   x = 3,179,735.06/2,306.59
6. Step 6: Final answer
   x = 1,378.54