Finding the Fourth Proportional to 1,401.02, 1,933.34 and 811.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.02 : 1,933.34 = 811.75 : x
2. Step 2: Convert to fraction form
   1,401.02/1,933.34 = 811.75/x
3. Step 3: Cross multiply
   1,401.02x = 1,933.34 × 811.75
4. Step 4: Simplify right side
   1,401.02x = 1,569,385.94
5. Step 5: Solve for x
   x = 1,569,385.94/1,401.02
6. Step 6: Final answer
   x = 1,120.17