Finding the Fourth Proportional to 2,196.39, 3,280.55 and 1,987.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.39 : 3,280.55 = 1,987.82 : x
2. Step 2: Convert to fraction form
   2,196.39/3,280.55 = 1,987.82/x
3. Step 3: Cross multiply
   2,196.39x = 3,280.55 × 1,987.82
4. Step 4: Simplify right side
   2,196.39x = 6,521,158.50
5. Step 5: Solve for x
   x = 6,521,158.50/2,196.39
6. Step 6: Final answer
   x = 2,969.03