Finding the Fourth Proportional to 1,262.86, 1,742.72 and 738.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,262.86 : 1,742.72 = 738.86 : x
2. Step 2: Convert to fraction form
   1,262.86/1,742.72 = 738.86/x
3. Step 3: Cross multiply
   1,262.86x = 1,742.72 × 738.86
4. Step 4: Simplify right side
   1,262.86x = 1,287,613.69
5. Step 5: Solve for x
   x = 1,287,613.69/1,262.86
6. Step 6: Final answer
   x = 1,019.60