Finding the Fourth Proportional to 2,458.05, 3,687.02 and 814.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,458.05 : 3,687.02 = 814.61 : x
2. Step 2: Convert to fraction form
   2,458.05/3,687.02 = 814.61/x
3. Step 3: Cross multiply
   2,458.05x = 3,687.02 × 814.61
4. Step 4: Simplify right side
   2,458.05x = 3,003,470.82
5. Step 5: Solve for x
   x = 3,003,470.82/2,458.05
6. Step 6: Final answer
   x = 1,221.89