Finding the Fourth Proportional to 1,401.23, 1,933.68 and 811.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.23 : 1,933.68 = 811.82 : x
2. Step 2: Convert to fraction form
   1,401.23/1,933.68 = 811.82/x
3. Step 3: Cross multiply
   1,401.23x = 1,933.68 × 811.82
4. Step 4: Simplify right side
   1,401.23x = 1,569,806.96
5. Step 5: Solve for x
   x = 1,569,806.96/1,401.23
6. Step 6: Final answer
   x = 1,120.30