Finding the Fourth Proportional to 2,045.79, 3,069.70 and 814.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,045.79 : 3,069.70 = 814.25 : x
2. Step 2: Convert to fraction form
   2,045.79/3,069.70 = 814.25/x
3. Step 3: Cross multiply
   2,045.79x = 3,069.70 × 814.25
4. Step 4: Simplify right side
   2,045.79x = 2,499,508.86
5. Step 5: Solve for x
   x = 2,499,508.86/2,045.79
6. Step 6: Final answer
   x = 1,221.78