Finding the Fourth Proportional to 2,196.90, 3,031.80 and 1,202.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.90 : 3,031.80 = 1,202.13 : x
2. Step 2: Convert to fraction form
   2,196.90/3,031.80 = 1,202.13/x
3. Step 3: Cross multiply
   2,196.90x = 3,031.80 × 1,202.13
4. Step 4: Simplify right side
   2,196.90x = 3,644,617.73
5. Step 5: Solve for x
   x = 3,644,617.73/2,196.90
6. Step 6: Final answer
   x = 1,658.98