Finding the Fourth Proportional to 1,728.74, 2,386.50 and 1,131.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,728.74 : 2,386.50 = 1,131.86 : x
2. Step 2: Convert to fraction form
   1,728.74/2,386.50 = 1,131.86/x
3. Step 3: Cross multiply
   1,728.74x = 2,386.50 × 1,131.86
4. Step 4: Simplify right side
   1,728.74x = 2,701,183.89
5. Step 5: Solve for x
   x = 2,701,183.89/1,728.74
6. Step 6: Final answer
   x = 1,562.52