Finding the Fourth Proportional to 2,285.55, 3,428.69 and 825.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,285.55 : 3,428.69 = 825.06 : x
2. Step 2: Convert to fraction form
   2,285.55/3,428.69 = 825.06/x
3. Step 3: Cross multiply
   2,285.55x = 3,428.69 × 825.06
4. Step 4: Simplify right side
   2,285.55x = 2,828,870.85
5. Step 5: Solve for x
   x = 2,828,870.85/2,285.55
6. Step 6: Final answer
   x = 1,237.72