Finding the Fourth Proportional to 2,280.31, 3,421.37 and 1,125.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,280.31 : 3,421.37 = 1,125.25 : x
2. Step 2: Convert to fraction form
   2,280.31/3,421.37 = 1,125.25/x
3. Step 3: Cross multiply
   2,280.31x = 3,421.37 × 1,125.25
4. Step 4: Simplify right side
   2,280.31x = 3,849,896.59
5. Step 5: Solve for x
   x = 3,849,896.59/2,280.31
6. Step 6: Final answer
   x = 1,688.32