Finding the Fourth Proportional to 2,457.18, 3,685.41 and 1,158.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,457.18 : 3,685.41 = 1,158.78 : x
2. Step 2: Convert to fraction form
   2,457.18/3,685.41 = 1,158.78/x
3. Step 3: Cross multiply
   2,457.18x = 3,685.41 × 1,158.78
4. Step 4: Simplify right side
   2,457.18x = 4,270,579.40
5. Step 5: Solve for x
   x = 4,270,579.40/2,457.18
6. Step 6: Final answer
   x = 1,738.00