Finding the Fourth Proportional to 825.91, 1,139.76 and 452.89

Step by Step Solution

1. Step 1: Write the proportion equation
   825.91 : 1,139.76 = 452.89 : x
2. Step 2: Convert to fraction form
   825.91/1,139.76 = 452.89/x
3. Step 3: Cross multiply
   825.91x = 1,139.76 × 452.89
4. Step 4: Simplify right side
   825.91x = 516,185.91
5. Step 5: Solve for x
   x = 516,185.91/825.91
6. Step 6: Final answer
   x = 624.99