Finding the Fourth Proportional to 1,401.50, 1,933.82 and 811.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.50 : 1,933.82 = 811.92 : x
2. Step 2: Convert to fraction form
   1,401.50/1,933.82 = 811.92/x
3. Step 3: Cross multiply
   1,401.50x = 1,933.82 × 811.92
4. Step 4: Simplify right side
   1,401.50x = 1,570,117.94
5. Step 5: Solve for x
   x = 1,570,117.94/1,401.50
6. Step 6: Final answer
   x = 1,120.31