Finding the Fourth Proportional to 1,407.10, 1,941.58 and 817.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.10 : 1,941.58 = 817.67 : x
2. Step 2: Convert to fraction form
   1,407.10/1,941.58 = 817.67/x
3. Step 3: Cross multiply
   1,407.10x = 1,941.58 × 817.67
4. Step 4: Simplify right side
   1,407.10x = 1,587,571.72
5. Step 5: Solve for x
   x = 1,587,571.72/1,407.10
6. Step 6: Final answer
   x = 1,128.26