Finding the Fourth Proportional to 1,384.28, 1,910.30 and 754.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.28 : 1,910.30 = 754.80 : x
2. Step 2: Convert to fraction form
   1,384.28/1,910.30 = 754.80/x
3. Step 3: Cross multiply
   1,384.28x = 1,910.30 × 754.80
4. Step 4: Simplify right side
   1,384.28x = 1,441,894.44
5. Step 5: Solve for x
   x = 1,441,894.44/1,384.28
6. Step 6: Final answer
   x = 1,041.62