Finding the Fourth Proportional to 2,280.29, 3,146.72 and 1,285.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,280.29 : 3,146.72 = 1,285.50 : x
2. Step 2: Convert to fraction form
   2,280.29/3,146.72 = 1,285.50/x
3. Step 3: Cross multiply
   2,280.29x = 3,146.72 × 1,285.50
4. Step 4: Simplify right side
   2,280.29x = 4,045,102.13
5. Step 5: Solve for x
   x = 4,045,102.13/2,280.29
6. Step 6: Final answer
   x = 1,773.95