Finding the Fourth Proportional to 1,401.67, 1,934.28 and 812.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.67 : 1,934.28 = 812.26 : x
2. Step 2: Convert to fraction form
   1,401.67/1,934.28 = 812.26/x
3. Step 3: Cross multiply
   1,401.67x = 1,934.28 × 812.26
4. Step 4: Simplify right side
   1,401.67x = 1,571,146.15
5. Step 5: Solve for x
   x = 1,571,146.15/1,401.67
6. Step 6: Final answer
   x = 1,120.91