Finding the Fourth Proportional to 1,404.12, 1,938.36 and 814.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.12 : 1,938.36 = 814.56 : x
2. Step 2: Convert to fraction form
   1,404.12/1,938.36 = 814.56/x
3. Step 3: Cross multiply
   1,404.12x = 1,938.36 × 814.56
4. Step 4: Simplify right side
   1,404.12x = 1,578,910.52
5. Step 5: Solve for x
   x = 1,578,910.52/1,404.12
6. Step 6: Final answer
   x = 1,124.48