Finding the Fourth Proportional to 2,986.78, 4,479 and 1,754.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,986.78 : 4,479 = 1,754.50 : x
2. Step 2: Convert to fraction form
   2,986.78/4,479 = 1,754.50/x
3. Step 3: Cross multiply
   2,986.78x = 4,479 × 1,754.50
4. Step 4: Simplify right side
   2,986.78x = 7,858,405.50
5. Step 5: Solve for x
   x = 7,858,405.50/2,986.78
6. Step 6: Final answer
   x = 2,631.06