Finding the Fourth Proportional to 1,311.43, 1,809.72 and 751.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,311.43 : 1,809.72 = 751.50 : x
2. Step 2: Convert to fraction form
   1,311.43/1,809.72 = 751.50/x
3. Step 3: Cross multiply
   1,311.43x = 1,809.72 × 751.50
4. Step 4: Simplify right side
   1,311.43x = 1,359,996.30
5. Step 5: Solve for x
   x = 1,359,996.30/1,311.43
6. Step 6: Final answer
   x = 1,037.03