Finding the Fourth Proportional to 2,280.56, 3,147.32 and 1,285.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,280.56 : 3,147.32 = 1,285.88 : x
2. Step 2: Convert to fraction form
   2,280.56/3,147.32 = 1,285.88/x
3. Step 3: Cross multiply
   2,280.56x = 3,147.32 × 1,285.88
4. Step 4: Simplify right side
   2,280.56x = 4,047,075.84
5. Step 5: Solve for x
   x = 4,047,075.84/2,280.56
6. Step 6: Final answer
   x = 1,774.60