Finding the Fourth Proportional to 2,176.50, 3,003.62 and 1,280.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,176.50 : 3,003.62 = 1,280.30 : x
2. Step 2: Convert to fraction form
   2,176.50/3,003.62 = 1,280.30/x
3. Step 3: Cross multiply
   2,176.50x = 3,003.62 × 1,280.30
4. Step 4: Simplify right side
   2,176.50x = 3,845,532.52
5. Step 5: Solve for x
   x = 3,845,532.52/2,176.50
6. Step 6: Final answer
   x = 1,766.85