Finding the Fourth Proportional to 1,435.25, 1,980.89 and 814.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.25 : 1,980.89 = 814.61 : x
2. Step 2: Convert to fraction form
   1,435.25/1,980.89 = 814.61/x
3. Step 3: Cross multiply
   1,435.25x = 1,980.89 × 814.61
4. Step 4: Simplify right side
   1,435.25x = 1,613,652.80
5. Step 5: Solve for x
   x = 1,613,652.80/1,435.25
6. Step 6: Final answer
   x = 1,124.30