Finding the Fourth Proportional to 1,909.83, 2,865.27 and 814.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,909.83 : 2,865.27 = 814.35 : x
2. Step 2: Convert to fraction form
   1,909.83/2,865.27 = 814.35/x
3. Step 3: Cross multiply
   1,909.83x = 2,865.27 × 814.35
4. Step 4: Simplify right side
   1,909.83x = 2,333,346.42
5. Step 5: Solve for x
   x = 2,333,346.42/1,909.83
6. Step 6: Final answer
   x = 1,221.76