Finding the Fourth Proportional to 1,254.79, 1,730.16 and 1,086.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,254.79 : 1,730.16 = 1,086.41 : x
2. Step 2: Convert to fraction form
   1,254.79/1,730.16 = 1,086.41/x
3. Step 3: Cross multiply
   1,254.79x = 1,730.16 × 1,086.41
4. Step 4: Simplify right side
   1,254.79x = 1,879,667.45
5. Step 5: Solve for x
   x = 1,879,667.45/1,254.79
6. Step 6: Final answer
   x = 1,497.99