Finding the Fourth Proportional to 1,238.86, 1,707.24 and 1,017.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,238.86 : 1,707.24 = 1,017.10 : x
2. Step 2: Convert to fraction form
   1,238.86/1,707.24 = 1,017.10/x
3. Step 3: Cross multiply
   1,238.86x = 1,707.24 × 1,017.10
4. Step 4: Simplify right side
   1,238.86x = 1,736,433.80
5. Step 5: Solve for x
   x = 1,736,433.80/1,238.86
6. Step 6: Final answer
   x = 1,401.64