Finding the Fourth Proportional to 1,404.96, 1,938.82 and 815.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.96 : 1,938.82 = 815.82 : x
2. Step 2: Convert to fraction form
   1,404.96/1,938.82 = 815.82/x
3. Step 3: Cross multiply
   1,404.96x = 1,938.82 × 815.82
4. Step 4: Simplify right side
   1,404.96x = 1,581,728.13
5. Step 5: Solve for x
   x = 1,581,728.13/1,404.96
6. Step 6: Final answer
   x = 1,125.82