Finding the Fourth Proportional to 3,196.58, 4,411.54 and 1,780.40

Step by Step Solution

1. Step 1: Write the proportion equation
   3,196.58 : 4,411.54 = 1,780.40 : x
2. Step 2: Convert to fraction form
   3,196.58/4,411.54 = 1,780.40/x
3. Step 3: Cross multiply
   3,196.58x = 4,411.54 × 1,780.40
4. Step 4: Simplify right side
   3,196.58x = 7,854,305.82
5. Step 5: Solve for x
   x = 7,854,305.82/3,196.58
6. Step 6: Final answer
   x = 2,457.10