Finding the Fourth Proportional to 1,435.24, 1,980.66 and 814.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.24 : 1,980.66 = 814.12 : x
2. Step 2: Convert to fraction form
   1,435.24/1,980.66 = 814.12/x
3. Step 3: Cross multiply
   1,435.24x = 1,980.66 × 814.12
4. Step 4: Simplify right side
   1,435.24x = 1,612,494.92
5. Step 5: Solve for x
   x = 1,612,494.92/1,435.24
6. Step 6: Final answer
   x = 1,123.50