Finding the Fourth Proportional to 1,435.43, 1,980.56 and 814.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.43 : 1,980.56 = 814.43 : x
2. Step 2: Convert to fraction form
   1,435.43/1,980.56 = 814.43/x
3. Step 3: Cross multiply
   1,435.43x = 1,980.56 × 814.43
4. Step 4: Simplify right side
   1,435.43x = 1,613,023.41
5. Step 5: Solve for x
   x = 1,613,023.41/1,435.43
6. Step 6: Final answer
   x = 1,123.72