Finding the Fourth Proportional to 2,459.83, 3,687.58 and 920.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,459.83 : 3,687.58 = 920.47 : x
2. Step 2: Convert to fraction form
   2,459.83/3,687.58 = 920.47/x
3. Step 3: Cross multiply
   2,459.83x = 3,687.58 × 920.47
4. Step 4: Simplify right side
   2,459.83x = 3,394,306.76
5. Step 5: Solve for x
   x = 3,394,306.76/2,459.83
6. Step 6: Final answer
   x = 1,379.89