Finding the Fourth Proportional to 1,401.10, 1,933.77 and 811.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.10 : 1,933.77 = 811.96 : x
2. Step 2: Convert to fraction form
   1,401.10/1,933.77 = 811.96/x
3. Step 3: Cross multiply
   1,401.10x = 1,933.77 × 811.96
4. Step 4: Simplify right side
   1,401.10x = 1,570,143.89
5. Step 5: Solve for x
   x = 1,570,143.89/1,401.10
6. Step 6: Final answer
   x = 1,120.65