Finding the Fourth Proportional to 2,014.40, 3,019.72 and 781.44

Step by Step Solution

1. Step 1: Write the proportion equation
   2,014.40 : 3,019.72 = 781.44 : x
2. Step 2: Convert to fraction form
   2,014.40/3,019.72 = 781.44/x
3. Step 3: Cross multiply
   2,014.40x = 3,019.72 × 781.44
4. Step 4: Simplify right side
   2,014.40x = 2,359,730.00
5. Step 5: Solve for x
   x = 2,359,730.00/2,014.40
6. Step 6: Final answer
   x = 1,171.43