Finding the Fourth Proportional to 2,078.59, 3,118.88 and 1,298.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.59 : 3,118.88 = 1,298.38 : x
2. Step 2: Convert to fraction form
   2,078.59/3,118.88 = 1,298.38/x
3. Step 3: Cross multiply
   2,078.59x = 3,118.88 × 1,298.38
4. Step 4: Simplify right side
   2,078.59x = 4,049,491.41
5. Step 5: Solve for x
   x = 4,049,491.41/2,078.59
6. Step 6: Final answer
   x = 1,948.19