Finding the Fourth Proportional to 2,196.95, 3,031.80 and 1,239.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.95 : 3,031.80 = 1,239.87 : x
2. Step 2: Convert to fraction form
   2,196.95/3,031.80 = 1,239.87/x
3. Step 3: Cross multiply
   2,196.95x = 3,031.80 × 1,239.87
4. Step 4: Simplify right side
   2,196.95x = 3,759,022.71
5. Step 5: Solve for x
   x = 3,759,022.71/2,196.95
6. Step 6: Final answer
   x = 1,711.02