Finding the Fourth Proportional to 1,401.14, 1,933.80 and 811.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.14 : 1,933.80 = 811.56 : x
2. Step 2: Convert to fraction form
   1,401.14/1,933.80 = 811.56/x
3. Step 3: Cross multiply
   1,401.14x = 1,933.80 × 811.56
4. Step 4: Simplify right side
   1,401.14x = 1,569,394.73
5. Step 5: Solve for x
   x = 1,569,394.73/1,401.14
6. Step 6: Final answer
   x = 1,120.08