Finding the Fourth Proportional to 1,404.82, 1,938.42 and 815.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.82 : 1,938.42 = 815.24 : x
2. Step 2: Convert to fraction form
   1,404.82/1,938.42 = 815.24/x
3. Step 3: Cross multiply
   1,404.82x = 1,938.42 × 815.24
4. Step 4: Simplify right side
   1,404.82x = 1,580,277.52
5. Step 5: Solve for x
   x = 1,580,277.52/1,404.82
6. Step 6: Final answer
   x = 1,124.90