Finding the Fourth Proportional to 4,196.90, 6,290.67 and 1,728.74

Step by Step Solution

1. Step 1: Write the proportion equation
   4,196.90 : 6,290.67 = 1,728.74 : x
2. Step 2: Convert to fraction form
   4,196.90/6,290.67 = 1,728.74/x
3. Step 3: Cross multiply
   4,196.90x = 6,290.67 × 1,728.74
4. Step 4: Simplify right side
   4,196.90x = 10,874,932.86
5. Step 5: Solve for x
   x = 10,874,932.86/4,196.90
6. Step 6: Final answer
   x = 2,591.18