Finding the Fourth Proportional to 1,435.72, 1,981.32 and 814.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.72 : 1,981.32 = 814.72 : x
2. Step 2: Convert to fraction form
   1,435.72/1,981.32 = 814.72/x
3. Step 3: Cross multiply
   1,435.72x = 1,981.32 × 814.72
4. Step 4: Simplify right side
   1,435.72x = 1,614,221.03
5. Step 5: Solve for x
   x = 1,614,221.03/1,435.72
6. Step 6: Final answer
   x = 1,124.33