Finding the Fourth Proportional to 2,196.10, 3,294.15 and 657.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.10 : 3,294.15 = 657.10 : x
2. Step 2: Convert to fraction form
   2,196.10/3,294.15 = 657.10/x
3. Step 3: Cross multiply
   2,196.10x = 3,294.15 × 657.10
4. Step 4: Simplify right side
   2,196.10x = 2,164,585.97
5. Step 5: Solve for x
   x = 2,164,585.97/2,196.10
6. Step 6: Final answer
   x = 985.65