Finding the Fourth Proportional to 3,715.58, 5,128.69 and 2,457.45

Step by Step Solution

1. Step 1: Write the proportion equation
   3,715.58 : 5,128.69 = 2,457.45 : x
2. Step 2: Convert to fraction form
   3,715.58/5,128.69 = 2,457.45/x
3. Step 3: Cross multiply
   3,715.58x = 5,128.69 × 2,457.45
4. Step 4: Simplify right side
   3,715.58x = 12,603,493.10
5. Step 5: Solve for x
   x = 12,603,493.10/3,715.58
6. Step 6: Final answer
   x = 3,392.06