Finding the Fourth Proportional to 2,687.55, 4,031.34 and 739.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,687.55 : 4,031.34 = 739.86 : x
2. Step 2: Convert to fraction form
   2,687.55/4,031.34 = 739.86/x
3. Step 3: Cross multiply
   2,687.55x = 4,031.34 × 739.86
4. Step 4: Simplify right side
   2,687.55x = 2,982,607.06
5. Step 5: Solve for x
   x = 2,982,607.06/2,687.55
6. Step 6: Final answer
   x = 1,109.79