Finding the Fourth Proportional to 2,659.98, 3,992.76 and 1,274.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,659.98 : 3,992.76 = 1,274.49 : x
2. Step 2: Convert to fraction form
   2,659.98/3,992.76 = 1,274.49/x
3. Step 3: Cross multiply
   2,659.98x = 3,992.76 × 1,274.49
4. Step 4: Simplify right side
   2,659.98x = 5,088,732.69
5. Step 5: Solve for x
   x = 5,088,732.69/2,659.98
6. Step 6: Final answer
   x = 1,913.07