Finding the Fourth Proportional to 3,196.70, 4,411.57 and 1,780.45

Step by Step Solution

1. Step 1: Write the proportion equation
   3,196.70 : 4,411.57 = 1,780.45 : x
2. Step 2: Convert to fraction form
   3,196.70/4,411.57 = 1,780.45/x
3. Step 3: Cross multiply
   3,196.70x = 4,411.57 × 1,780.45
4. Step 4: Simplify right side
   3,196.70x = 7,854,579.81
5. Step 5: Solve for x
   x = 7,854,579.81/3,196.70
6. Step 6: Final answer
   x = 2,457.09