Finding the Fourth Proportional to 2,275.80, 3,412.59 and 814.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,275.80 : 3,412.59 = 814.59 : x
2. Step 2: Convert to fraction form
   2,275.80/3,412.59 = 814.59/x
3. Step 3: Cross multiply
   2,275.80x = 3,412.59 × 814.59
4. Step 4: Simplify right side
   2,275.80x = 2,779,861.69
5. Step 5: Solve for x
   x = 2,779,861.69/2,275.80
6. Step 6: Final answer
   x = 1,221.49