Finding the Fourth Proportional to 1,403.55, 1,936.90 and 814.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,403.55 : 1,936.90 = 814.42 : x
2. Step 2: Convert to fraction form
   1,403.55/1,936.90 = 814.42/x
3. Step 3: Cross multiply
   1,403.55x = 1,936.90 × 814.42
4. Step 4: Simplify right side
   1,403.55x = 1,577,450.10
5. Step 5: Solve for x
   x = 1,577,450.10/1,403.55
6. Step 6: Final answer
   x = 1,123.90