Finding the Fourth Proportional to 1,401.75, 1,934.49 and 928.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.75 : 1,934.49 = 928.80 : x
2. Step 2: Convert to fraction form
   1,401.75/1,934.49 = 928.80/x
3. Step 3: Cross multiply
   1,401.75x = 1,934.49 × 928.80
4. Step 4: Simplify right side
   1,401.75x = 1,796,754.31
5. Step 5: Solve for x
   x = 1,796,754.31/1,401.75
6. Step 6: Final answer
   x = 1,281.79