Finding the Fourth Proportional to 2,196.65, 3,290.70 and 1,962.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.65 : 3,290.70 = 1,962.96 : x
2. Step 2: Convert to fraction form
   2,196.65/3,290.70 = 1,962.96/x
3. Step 3: Cross multiply
   2,196.65x = 3,290.70 × 1,962.96
4. Step 4: Simplify right side
   2,196.65x = 6,459,512.47
5. Step 5: Solve for x
   x = 6,459,512.47/2,196.65
6. Step 6: Final answer
   x = 2,940.63