Finding the Fourth Proportional to 3,012.46, 4,517.61 and 1,280.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,012.46 : 4,517.61 = 1,280.50 : x
2. Step 2: Convert to fraction form
   3,012.46/4,517.61 = 1,280.50/x
3. Step 3: Cross multiply
   3,012.46x = 4,517.61 × 1,280.50
4. Step 4: Simplify right side
   3,012.46x = 5,784,799.61
5. Step 5: Solve for x
   x = 5,784,799.61/3,012.46
6. Step 6: Final answer
   x = 1,920.29