Finding the Fourth Proportional to 1,401.03, 1,934.08 and 811.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.03 : 1,934.08 = 811.45 : x
2. Step 2: Convert to fraction form
   1,401.03/1,934.08 = 811.45/x
3. Step 3: Cross multiply
   1,401.03x = 1,934.08 × 811.45
4. Step 4: Simplify right side
   1,401.03x = 1,569,409.60
5. Step 5: Solve for x
   x = 1,569,409.60/1,401.03
6. Step 6: Final answer
   x = 1,120.18