Finding the Fourth Proportional to 1,336.72, 2,003.88 and 514.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,336.72 : 2,003.88 = 514.76 : x
2. Step 2: Convert to fraction form
   1,336.72/2,003.88 = 514.76/x
3. Step 3: Cross multiply
   1,336.72x = 2,003.88 × 514.76
4. Step 4: Simplify right side
   1,336.72x = 1,031,517.27
5. Step 5: Solve for x
   x = 1,031,517.27/1,336.72
6. Step 6: Final answer
   x = 771.68