Finding the Fourth Proportional to 2,014.30, 3,020.55 and 781.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,014.30 : 3,020.55 = 781.30 : x
2. Step 2: Convert to fraction form
   2,014.30/3,020.55 = 781.30/x
3. Step 3: Cross multiply
   2,014.30x = 3,020.55 × 781.30
4. Step 4: Simplify right side
   2,014.30x = 2,359,955.72
5. Step 5: Solve for x
   x = 2,359,955.72/2,014.30
6. Step 6: Final answer
   x = 1,171.60