Finding the Fourth Proportional to 2,698.55, 3,723.76 and 1,990.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,698.55 : 3,723.76 = 1,990.77 : x
2. Step 2: Convert to fraction form
   2,698.55/3,723.76 = 1,990.77/x
3. Step 3: Cross multiply
   2,698.55x = 3,723.76 × 1,990.77
4. Step 4: Simplify right side
   2,698.55x = 7,413,139.74
5. Step 5: Solve for x
   x = 7,413,139.74/2,698.55
6. Step 6: Final answer
   x = 2,747.09