Finding the Fourth Proportional to 1,403.89, 1,936.58 and 814.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,403.89 : 1,936.58 = 814.34 : x
2. Step 2: Convert to fraction form
   1,403.89/1,936.58 = 814.34/x
3. Step 3: Cross multiply
   1,403.89x = 1,936.58 × 814.34
4. Step 4: Simplify right side
   1,403.89x = 1,577,035.33
5. Step 5: Solve for x
   x = 1,577,035.33/1,403.89
6. Step 6: Final answer
   x = 1,123.33