Finding the Fourth Proportional to 1,401.12, 1,933.73 and 811.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.12 : 1,933.73 = 811.70 : x
2. Step 2: Convert to fraction form
   1,401.12/1,933.73 = 811.70/x
3. Step 3: Cross multiply
   1,401.12x = 1,933.73 × 811.70
4. Step 4: Simplify right side
   1,401.12x = 1,569,601.00
5. Step 5: Solve for x
   x = 1,569,601.00/1,401.12
6. Step 6: Final answer
   x = 1,120.25