Finding the Fourth Proportional to 1,407.46, 1,942.59 and 817.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.46 : 1,942.59 = 817.96 : x
2. Step 2: Convert to fraction form
   1,407.46/1,942.59 = 817.96/x
3. Step 3: Cross multiply
   1,407.46x = 1,942.59 × 817.96
4. Step 4: Simplify right side
   1,407.46x = 1,588,960.92
5. Step 5: Solve for x
   x = 1,588,960.92/1,407.46
6. Step 6: Final answer
   x = 1,128.96