Finding the Fourth Proportional to 2,647.80, 3,968.82 and 1,107

Step by Step Solution

1. Step 1: Write the proportion equation
   2,647.80 : 3,968.82 = 1,107 : x
2. Step 2: Convert to fraction form
   2,647.80/3,968.82 = 1,107/x
3. Step 3: Cross multiply
   2,647.80x = 3,968.82 × 1,107
4. Step 4: Simplify right side
   2,647.80x = 4,393,483.74
5. Step 5: Solve for x
   x = 4,393,483.74/2,647.80
6. Step 6: Final answer
   x = 1,659.30