Finding the Fourth Proportional to 2,196.58, 3,276.56 and 1,988.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.58 : 3,276.56 = 1,988.82 : x
2. Step 2: Convert to fraction form
   2,196.58/3,276.56 = 1,988.82/x
3. Step 3: Cross multiply
   2,196.58x = 3,276.56 × 1,988.82
4. Step 4: Simplify right side
   2,196.58x = 6,516,488.06
5. Step 5: Solve for x
   x = 6,516,488.06/2,196.58
6. Step 6: Final answer
   x = 2,966.65