Finding the Fourth Proportional to 1,401.98, 1,934.60 and 812.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.98 : 1,934.60 = 812.56 : x
2. Step 2: Convert to fraction form
   1,401.98/1,934.60 = 812.56/x
3. Step 3: Cross multiply
   1,401.98x = 1,934.60 × 812.56
4. Step 4: Simplify right side
   1,401.98x = 1,571,978.58
5. Step 5: Solve for x
   x = 1,571,978.58/1,401.98
6. Step 6: Final answer
   x = 1,121.26